diff --git a/config/.env.example b/config/.env.example
index c3aa657064..5bfbfe81a6 100644
--- a/config/.env.example
+++ b/config/.env.example
@@ -23,7 +23,6 @@ export APP_DEFAULT_TIMEZONE="Asia/Tokyo"
 export INSTALL_MODE="true"
 export USE_DEBUG_KIT="false"
 export SITE_URL="https://localhost/"
-export SSL_URL="https://localhost/"
 export ADMIN_PREFIX="admin"
 export BASER_CORE_PREFIX="baser"
 export SQL_LOG="false"
diff --git a/plugins/baser-core/config/setting.php b/plugins/baser-core/config/setting.php
index 3d05bde08c..9421896892 100644
--- a/plugins/baser-core/config/setting.php
+++ b/plugins/baser-core/config/setting.php
@@ -157,10 +157,6 @@
          * サイトURL
          */
         'siteUrl' => env('SITE_URL', 'https://localhost/'),
-        /**
-         * SSL URL
-         */
-        'sslUrl' => env('SSL_URL', 'https://localhost/'),
         /**
          * CMS URL
          * CMSのURLが別ドメインの場合に設定する
diff --git a/plugins/baser-core/src/Controller/Admin/BcAdminAppController.php b/plugins/baser-core/src/Controller/Admin/BcAdminAppController.php
index 2d2281338b..d1dc613ca3 100644
--- a/plugins/baser-core/src/Controller/Admin/BcAdminAppController.php
+++ b/plugins/baser-core/src/Controller/Admin/BcAdminAppController.php
@@ -183,7 +183,7 @@ protected function _checkReferer(): bool
     }
 
     /**
-     * siteUrlや、sslUrlと現在のURLが違う場合には、そちらのURLにリダイレクトを行う
+     * siteUrlや、cmsUrlと現在のURLが違う場合には、そちらのURLにリダイレクトを行う
      * setting.php にて、cmsUrlとして、cmsUrlを定義した場合にはそちらを優先する
      * @return Response|void|null
      * @checked
@@ -194,8 +194,6 @@ public function redirectIfIsNotSameSite()
     {
         if (Configure::read('BcEnv.cmsUrl')) {
             $siteUrl = Configure::read('BcEnv.cmsUrl');
-        } elseif ($this->getRequest()->is('https')) {
-            $siteUrl = Configure::read('BcEnv.sslUrl');
         } else {
             $siteUrl = Configure::read('BcEnv.siteUrl');
         }
diff --git a/plugins/baser-core/src/Model/Table/SiteConfigsTable.php b/plugins/baser-core/src/Model/Table/SiteConfigsTable.php
index bd497be7b1..41f2ab588a 100755
--- a/plugins/baser-core/src/Model/Table/SiteConfigsTable.php
+++ b/plugins/baser-core/src/Model/Table/SiteConfigsTable.php
@@ -85,10 +85,6 @@ public function validationKeyValue(Validator $validator): Validator
             ->scalar('site_url')
             ->regex('site_url', '/^(http|https):/', __d('baser_core', 'WebサイトURLはURLの形式を入力してください。'))
             ->notEmptyString('site_url', __d('baser_core', 'WebサイトURLを入力してください。'));
-        $validator
-            ->scalar('ssl_url')
-            ->regex('ssl_url', '/^(http|https):/', __d('baser_core', 'WebサイトURLはURLの形式を入力してください。'))
-            ->notEmptyString('ssl_url', __d('baser_core', 'WebサイトURLを入力してください。'));
         return $validator;
     }
 
diff --git a/plugins/baser-core/src/Service/PermissionsService.php b/plugins/baser-core/src/Service/PermissionsService.php
index db6800690b..613d66975e 100644
--- a/plugins/baser-core/src/Service/PermissionsService.php
+++ b/plugins/baser-core/src/Service/PermissionsService.php
@@ -441,8 +441,8 @@ private function checkGroup(
     {
         // ドメイン部分を除外
         if(preg_match('/^(http(s|):\/\/[^\/]+?\/)(.*?)$/', $url, $matches)) {
-            if(in_array($matches[1], [Configure::read('BcEnv.siteUrl'), Configure::read('BcEnv.sslUrl')])) {
-                $url = str_replace([Configure::read('BcEnv.siteUrl'), Configure::read('BcEnv.sslUrl')], '', $url);
+            if(in_array($matches[1], [Configure::read('BcEnv.siteUrl')])) {
+                $url = str_replace([Configure::read('BcEnv.siteUrl')], '', $url);
                 if(!$url) $url = '/';
             } else {
                 return true;
diff --git a/plugins/baser-core/src/Service/SiteConfigsService.php b/plugins/baser-core/src/Service/SiteConfigsService.php
index 9dcfad37e8..b4a861cd32 100644
--- a/plugins/baser-core/src/Service/SiteConfigsService.php
+++ b/plugins/baser-core/src/Service/SiteConfigsService.php
@@ -98,7 +98,6 @@ public function get(): SiteConfig
             $this->entity = $this->SiteConfigs->newEntity(array_merge($this->SiteConfigs->getKeyValue(), [
                 'mode' => Configure::read('debug'),
                 'site_url' => Configure::read('BcEnv.siteUrl'),
-                'ssl_url' => Configure::read('BcEnv.sslUrl'),
             ]), ['validate' => 'keyValue']);
         }
         return $this->entity;
@@ -132,22 +131,16 @@ public function update(array $postData)
         if ($siteConfig->site_url && !preg_match('/\/$/', $siteConfig->site_url)) {
             $siteConfig->site_url .= '/';
         }
-        if ($siteConfig->ssl_url && !preg_match('/\/$/', $siteConfig->ssl_url)) {
-            $siteConfig->ssl_url .= '/';
-        }
 
         if ($this->isWritableEnv()) {
             if (isset($siteConfig->mode)) $this->putEnv('DEBUG', ($siteConfig->mode)? 'true' : 'false');
             if (isset($siteConfig->site_url)) $this->putEnv('SITE_URL', $siteConfig->site_url);
-            if (isset($siteConfig->ssl_url)) $this->putEnv('SSL_URL', $siteConfig->ssl_url);
         }
 
         $siteConfigArray = $siteConfig->toArray();
         unset($siteConfigArray['mode'],
             $siteConfigArray['site_url'],
-            $siteConfigArray['ssl_url'],
             $siteConfigArray['dummy-site_url'],
-            $siteConfigArray['dummy-ssl_url']
         );
 
         if ($this->SiteConfigs->saveKeyValue($siteConfigArray)) {
diff --git a/plugins/baser-core/src/View/Helper/BcBaserHelper.php b/plugins/baser-core/src/View/Helper/BcBaserHelper.php
index bee169518e..139dff37c7 100755
--- a/plugins/baser-core/src/View/Helper/BcBaserHelper.php
+++ b/plugins/baser-core/src/View/Helper/BcBaserHelper.php
@@ -2341,32 +2341,26 @@ public function getSiteName()
     /**
      * WebサイトURLを出力する
      *
-     * @param bool ssl （初期値 : false）
      * @return void
      * @checked
      * @noTodo
      * @unitTest
      */
-    public function siteUrl($ssl = false)
+    public function siteUrl()
     {
-        echo $this->getSiteUrl($ssl);
+        echo $this->getSiteUrl();
     }
 
     /**
      * WebサイトURLを取得する
      *
-     * @param bool ssl （初期値 : false）
      * @return string サイト基本設定のWebサイト名
      * @checked
      * @noTodo
      */
-    public function getSiteUrl($ssl = false)
+    public function getSiteUrl()
     {
-        if ($ssl) {
-            return Configure::read('BcEnv.sslUrl');
-        } else {
-            return Configure::read('BcEnv.siteUrl');
-        }
+        return Configure::read('BcEnv.siteUrl');
     }
 
     /**
diff --git a/plugins/baser-core/src/View/Helper/BcSmartphoneHelper.php b/plugins/baser-core/src/View/Helper/BcSmartphoneHelper.php
index 49d4de256c..943c65fc14 100755
--- a/plugins/baser-core/src/View/Helper/BcSmartphoneHelper.php
+++ b/plugins/baser-core/src/View/Helper/BcSmartphoneHelper.php
@@ -62,16 +62,12 @@ public function afterLayout($layoutFile)
             // 内部リンクの自動変換
             if ($site->auto_link) {
                 $siteUrl = Configure::read('BcEnv.siteUrl');
-                $sslUrl = Configure::read('BcEnv.sslUrl');
                 $currentAlias = $request->getAttribute('currentSite')->alias;
                 $base = '/' . $request->getAttribute('base');
                 $regBaseUrls = [
                     preg_quote($base, '/'),
                     preg_quote(preg_replace('/\/$/', '', $siteUrl) . $base, '/'),
                 ];
-                if ($sslUrl) {
-                    $regBaseUrls[] = preg_quote(preg_replace('/\/$/', '', $sslUrl) . $base, '/');
-                }
                 $regBaseUrl = implode('|', $regBaseUrls);
 
                 // 一旦プレフィックスを除外
diff --git a/plugins/baser-core/tests/TestCase/Model/Table/SiteConfigsTableTest.php b/plugins/baser-core/tests/TestCase/Model/Table/SiteConfigsTableTest.php
index db2579873b..c2b4126a25 100644
--- a/plugins/baser-core/tests/TestCase/Model/Table/SiteConfigsTableTest.php
+++ b/plugins/baser-core/tests/TestCase/Model/Table/SiteConfigsTableTest.php
@@ -104,7 +104,6 @@ public function testValidationKeyValueRegular()
                 'name' => 'hoge',
                 'email' => 'hoge@basercms.net',
                 'site_url' => 'https://localhost/',
-                'ssl_url' => 'https://localhost/',
         ]);
         $this->assertEmpty($errors);
     }
@@ -116,18 +115,14 @@ public function testvalidationKeyValueURL()
     {
         $validator = $this->SiteConfigs->getValidator('keyValue');
         $errors = $validator->validate([
-            'ssl_url' => 'hoge',
             'site_url' => 'hoge',
         ]);
-        $this->assertEquals('WebサイトURLはURLの形式を入力してください。', current($errors['ssl_url']));
         $this->assertEquals('WebサイトURLはURLの形式を入力してください。', current($errors['site_url']));
 
         $validator = $this->SiteConfigs->getValidator('keyValue');
         $errors = $validator->validate([
-            'ssl_url' => '/hoge',
             'site_url' => '/hoge',
         ]);
-        $this->assertEquals('WebサイトURLはURLの形式を入力してください。', current($errors['ssl_url']));
         $this->assertEquals('WebサイトURLはURLの形式を入力してください。', current($errors['site_url']));
     }
 
diff --git a/plugins/baser-core/tests/TestCase/PluginTest.php b/plugins/baser-core/tests/TestCase/PluginTest.php
index 9369c8378f..25c743afe7 100644
--- a/plugins/baser-core/tests/TestCase/PluginTest.php
+++ b/plugins/baser-core/tests/TestCase/PluginTest.php
@@ -129,7 +129,6 @@ public function testBootStrap(): void
 
 export INSTALL_MODE="false"
 export SITE_URL="https://localhost/"
-export SSL_URL="https://localhost/"
 export ADMIN_PREFIX="admin"
 export BASER_CORE_PREFIX="baser"
 export SQL_LOG="false"
diff --git a/plugins/baser-core/tests/TestCase/Service/SiteConfigsServiceTest.php b/plugins/baser-core/tests/TestCase/Service/SiteConfigsServiceTest.php
index 0dac5f44ed..c10dc0a06b 100644
--- a/plugins/baser-core/tests/TestCase/Service/SiteConfigsServiceTest.php
+++ b/plugins/baser-core/tests/TestCase/Service/SiteConfigsServiceTest.php
@@ -76,7 +76,6 @@ public function testGet()
         $result = $this->SiteConfigs->get();
         $this->assertArrayHasKey('mode', $result);
         $this->assertArrayHasKey('site_url', $result);
-        $this->assertArrayHasKey('ssl_url', $result);
     }
 
     /**
diff --git a/plugins/baser-core/tests/TestCase/View/Helper/BcBaserHelperTest.php b/plugins/baser-core/tests/TestCase/View/Helper/BcBaserHelperTest.php
index 9c3a55aba2..d9671a1f6c 100644
--- a/plugins/baser-core/tests/TestCase/View/Helper/BcBaserHelperTest.php
+++ b/plugins/baser-core/tests/TestCase/View/Helper/BcBaserHelperTest.php
@@ -325,12 +325,8 @@ public function testGetLink($title, $url, $option, $expected)
         if (!empty($option['forceTitle'])) {
             $this->loginAdmin($this->getRequest('/baser/admin'), 2);
         }
-        if (!empty($option['ssl'])) {
-            Configure::write('BcEnv.sslUrl', 'https://localhost/');
-        }
         $result = $this->BcBaser->getLink($title, $url, $option);
         $this->assertEquals($expected, $result);
-        Configure::write('BcEnv.sslUrl', '');
     }
 
     public static function getLinkDataProvider()
@@ -344,9 +340,6 @@ public static function getLinkDataProvider()
             ['<b>title</b>', 'https://example.com/<b>link</b>', ['escapeTitle' => false], '<a href="https://example.com/&lt;b&gt;link&lt;/b&gt;"><b>title</b></a>'], // エスケープ
             ['固定ページ管理', ['prefix' => 'Admin', 'controller' => 'pages', 'action' => 'index'], [], '<a href="/baser/admin/baser-core/pages/index">固定ページ管理</a>'],    // プレフィックス
             ['システム設定', ['Admin' => true, 'controller' => 'site_configs', 'action' => 'index'], ['forceTitle' => true], '<span>システム設定</span>'],    // 強制タイトル
-            ['会社案内', '/about', ['ssl' => true], '<a href="https://localhost/about">会社案内</a>'], // SSL
-            ['テーマファイル管理', ['controller' => 'themes', 'action' => 'manage', 'jsa'], ['ssl' => true], '<a href="https://localhost/baser-core/themes/manage/jsa">テーマファイル管理</a>'], // SSL
-            ['画像', '/img/test.jpg', ['ssl' => true], '<a href="https://localhost/img/test.jpg">画像</a>'], // SSL
         ];
     }
 
@@ -1816,12 +1809,7 @@ public function testGetSiteName()
     public function testGetSiteUrl()
     {
         Configure::write('BcEnv.siteUrl', 'https://basercms.net/');
-        Configure::write('BcEnv.sslUrl', 'https://basercms.net/');
-
-        // http
         $this->assertEquals('https://basercms.net/', $this->BcBaser->getSiteUrl());
-        //https
-        $this->assertEquals('https://basercms.net/', $this->BcBaser->getSiteUrl(true));
     }
 
     /**
diff --git a/plugins/bc-admin-third/templates/Admin/SiteConfigs/index.php b/plugins/bc-admin-third/templates/Admin/SiteConfigs/index.php
index 58bb2c2804..2d7e9c5dc2 100755
--- a/plugins/bc-admin-third/templates/Admin/SiteConfigs/index.php
+++ b/plugins/bc-admin-third/templates/Admin/SiteConfigs/index.php
@@ -60,21 +60,11 @@
         <input type="password" name="dummy-site_url" style="display: none">
         <?php $this->BcAdminForm->unlockFields('dummy-site_url') ?>
         <?php echo $this->BcAdminForm->control('site_url', ['type' => 'text', 'size' => 35, 'maxlength' => 255, 'data-margin' => 'bottom', 'disabled' => !$isWritableEnv]) ?>
-        <br>
-        <input type="password" name="dummy-ssl_url" style="display: none">
-        <?php $this->BcAdminForm->unlockFields('dummy-ssl_url') ?>
-        <?php echo $this->BcAdminForm->control('ssl_url', [
-            'type' => 'text',
-            'size' => 35,
-            'maxlength' => 255,
-            'disabled' => !$isWritableEnv]
-        ) ?> <small>[SSL]</small>
         <i class="bca-icon--question-circle bca-help"></i>
         <div class="bca-helptext">
-          <?php echo __d('baser_core', 'baserCMSを設置しているURLを指定します。管理画面等でSSL通信を利用する場合は、SSL通信で利用するURLも指定します。') ?>
+          <?php echo __d('baser_core', 'baserCMSを設置しているURLを指定します。') ?>
         </div>
         <?php echo $this->BcAdminForm->error('site_url') ?>
-        <?php echo $this->BcAdminForm->error('ssl_url') ?>
       </td>
     </tr>
 
diff --git a/plugins/bc-installer/src/Command/InstallCommand.php b/plugins/bc-installer/src/Command/InstallCommand.php
index 80a01ce311..44b9d9f994 100644
--- a/plugins/bc-installer/src/Command/InstallCommand.php
+++ b/plugins/bc-installer/src/Command/InstallCommand.php
@@ -186,7 +186,6 @@ public function install(Arguments $args, ConsoleIo $io, array $dbConfig)
         $service->buildPermissions();
         $siteConfigsService = $this->getService(SiteConfigsServiceInterface::class);
         $siteConfigsService->putEnv('SITE_URL', $siteUrl);
-        $siteConfigsService->putEnv('SSL_URL', $siteUrl);
         if ($dbConfig['datasource'] === 'postgres') {
             $service->BcDatabase->updateSequence();
         }
diff --git a/plugins/bc-installer/src/Service/Admin/InstallationsAdminService.php b/plugins/bc-installer/src/Service/Admin/InstallationsAdminService.php
index 14265b9c0c..65b4dafb3e 100644
--- a/plugins/bc-installer/src/Service/Admin/InstallationsAdminService.php
+++ b/plugins/bc-installer/src/Service/Admin/InstallationsAdminService.php
@@ -344,7 +344,6 @@ public function initDb(ServerRequest $request): void
         // SITE_URL更新
         $siteConfigsService = $this->getService(SiteConfigsServiceInterface::class);
         $siteConfigsService->putEnv('SITE_URL', BcUtil::siteUrl());
-        $siteConfigsService->putEnv('SSL_URL', BcUtil::siteUrl());
 
         // シーケンスを更新する
         $dbConfig = ConnectionManager::getConfig('default');
diff --git a/plugins/bc-mail/src/Model/Table/MailContentsTable.php b/plugins/bc-mail/src/Model/Table/MailContentsTable.php
index 806b4c9167..3a7d16c538 100755
--- a/plugins/bc-mail/src/Model/Table/MailContentsTable.php
+++ b/plugins/bc-mail/src/Model/Table/MailContentsTable.php
@@ -178,35 +178,9 @@ public function validationDefault(Validator $validator): Validator
                     'message' => __d('baser_core', 'BCC用送信先メールアドレスのEメールの形式が不正です。')
                 ]]);
 
-        // ssl_on
-        $validator
-            ->add('ssl_on', [
-                'checkSslUrl' => [
-                    'rule' => 'checkSslUrl',
-                    'provider' => 'table',
-                    'message' => __d('baser_core', 'SSL通信を利用するには、システム設定で、事前にSSL通信用のWebサイトURLを指定してください。')
-                ]]);
-
         return $validator;
     }
 
-    /**
-     * SSL用のURLが設定されているかチェックする
-     *
-     * @param array $check チェック対象文字列
-     * @return boolean
-     * @checked
-     * @noTodo
-     * @unitTest
-     */
-    public function checkSslUrl($value)
-    {
-        if ($value && !Configure::read('BcEnv.sslUrl')) {
-            return false;
-        }
-        return true;
-    }
-
     /**
      * 英数チェック
      *
diff --git a/plugins/bc-mail/tests/TestCase/Model/Table/MailContentsTableTest.php b/plugins/bc-mail/tests/TestCase/Model/Table/MailContentsTableTest.php
index cc152f1c1d..7fff124be7 100755
--- a/plugins/bc-mail/tests/TestCase/Model/Table/MailContentsTableTest.php
+++ b/plugins/bc-mail/tests/TestCase/Model/Table/MailContentsTableTest.php
@@ -144,27 +144,6 @@ public function testInputTypeErrors()
         $this->assertEquals('リダイレクトURLはURLの形式を入力してください。', current($errors['redirect_url']));
     }
 
-    public function testSSLTrue()
-    {
-        Configure::write('BcEnv.sslUrl', 'on');
-        $validator = $this->MailContent->getValidator('default');
-        $errors = $validator->validate([
-            'ssl_on' => ['on'],
-        ]);
-        $this->assertCount(0, $errors);
-    }
-
-    public function testSSLFalse()
-    {
-        Configure::write('BcEnv.sslUrl', '');
-        $validator = $this->MailContent->getValidator('default');
-        $errors = $validator->validate([
-            'ssl_on' => ['on'],
-        ]);
-
-        $this->assertEquals('SSL通信を利用するには、システム設定で、事前にSSL通信用のWebサイトURLを指定してください。', current($errors['ssl_on']));
-    }
-
     public function testURLErrors()
     {
         //エラーテスト
@@ -199,25 +178,6 @@ public function testURLErrors()
         $this->assertCount(0, $errors);
     }
 
-    /**
-     * SSL用のURLが設定されているかチェックする
-     * @dataProvider checkSslUrlProvider
-     */
-    public function testCheckSslUrl($expected, $sslUrl, $value)
-    {
-        Configure::write('BcEnv.sslUrl', $sslUrl);
-        $this->assertEquals($expected, $this->MailContent->checkSslUrl($value));
-    }
-
-    public static function checkSslUrlProvider()
-    {
-        return [
-            [true, true, 'https://example.com/'],
-            [false, false, 'https://example.com/'],
-            [true, false, null],
-        ];
-    }
-
     /**
      * 英数チェック
      * @dataProvider alphaNumericDataProvider