diff --git a/build_util/make_docs.py b/build_util/make_docs.py
index 696a38041..6634642fd 100644
--- a/build_util/make_docs.py
+++ b/build_util/make_docs.py
@@ -8,7 +8,7 @@
 from voicevox_engine.dev.tts_engine.mock import MockTTSEngine
 from voicevox_engine.engine_manifest import load_manifest
 from voicevox_engine.preset.Preset import PresetManager
-from voicevox_engine.setting.Setting import USER_SETTING_PATH, SettingHandler
+from voicevox_engine.setting.setting_manager import USER_SETTING_PATH, SettingHandler
 from voicevox_engine.tts_pipeline.tts_engine import TTSEngineManager
 from voicevox_engine.user_dict.user_dict import UserDictionary
 from voicevox_engine.utility.path_utility import engine_manifest_path, engine_root
diff --git a/run.py b/run.py
index dc34dbe32..1168b4c28 100644
--- a/run.py
+++ b/run.py
@@ -16,11 +16,8 @@
 from voicevox_engine.core.core_initializer import initialize_cores
 from voicevox_engine.engine_manifest import load_manifest
 from voicevox_engine.preset.Preset import PresetManager
-from voicevox_engine.setting.Setting import (
-    USER_SETTING_PATH,
-    CorsPolicyMode,
-    SettingHandler,
-)
+from voicevox_engine.setting.model import CorsPolicyMode
+from voicevox_engine.setting.setting_manager import USER_SETTING_PATH, SettingHandler
 from voicevox_engine.tts_pipeline.tts_engine import make_tts_engines_from_cores
 from voicevox_engine.user_dict.user_dict import UserDictionary
 from voicevox_engine.utility.path_utility import engine_manifest_path, engine_root
diff --git a/test/benchmark/engine_preparation.py b/test/benchmark/engine_preparation.py
index 059d2c791..36dcf9787 100644
--- a/test/benchmark/engine_preparation.py
+++ b/test/benchmark/engine_preparation.py
@@ -11,7 +11,7 @@
 from voicevox_engine.core.core_initializer import initialize_cores
 from voicevox_engine.engine_manifest import load_manifest
 from voicevox_engine.preset.PresetManager import PresetManager
-from voicevox_engine.setting.Setting import SettingHandler
+from voicevox_engine.setting.setting_manager import SettingHandler
 from voicevox_engine.tts_pipeline.tts_engine import make_tts_engines_from_cores
 from voicevox_engine.user_dict.user_dict import UserDictionary
 from voicevox_engine.utility.core_version_utility import get_latest_version
diff --git a/test/e2e/conftest.py b/test/e2e/conftest.py
index d755e54f0..01acbbbb0 100644
--- a/test/e2e/conftest.py
+++ b/test/e2e/conftest.py
@@ -10,7 +10,7 @@
 from voicevox_engine.core.core_initializer import initialize_cores
 from voicevox_engine.engine_manifest import load_manifest
 from voicevox_engine.preset.Preset import PresetManager
-from voicevox_engine.setting.Setting import SettingHandler
+from voicevox_engine.setting.setting_manager import SettingHandler
 from voicevox_engine.tts_pipeline.tts_engine import make_tts_engines_from_cores
 from voicevox_engine.user_dict.user_dict import UserDictionary
 from voicevox_engine.utility.path_utility import engine_manifest_path
diff --git a/test/setting/test_setting.py b/test/setting/test_setting.py
index 677c2b3d3..879dbf4d8 100644
--- a/test/setting/test_setting.py
+++ b/test/setting/test_setting.py
@@ -3,7 +3,8 @@
 import pytest
 from pydantic import ValidationError
 
-from voicevox_engine.setting.Setting import CorsPolicyMode, Setting, SettingHandler
+from voicevox_engine.setting.model import CorsPolicyMode
+from voicevox_engine.setting.setting_manager import Setting, SettingHandler
 
 
 def test_setting_handler_load_not_exist_file() -> None:
diff --git a/voicevox_engine/app/application.py b/voicevox_engine/app/application.py
index bbe435f1d..d6e4a2714 100644
--- a/voicevox_engine/app/application.py
+++ b/voicevox_engine/app/application.py
@@ -21,7 +21,8 @@
 from voicevox_engine.library_manager import LibraryManager
 from voicevox_engine.metas.MetasStore import MetasStore
 from voicevox_engine.preset.Preset import PresetManager
-from voicevox_engine.setting.Setting import CorsPolicyMode, SettingHandler
+from voicevox_engine.setting.model import CorsPolicyMode
+from voicevox_engine.setting.setting_manager import SettingHandler
 from voicevox_engine.tts_pipeline.tts_engine import TTSEngineManager
 from voicevox_engine.user_dict.user_dict import UserDictionary
 from voicevox_engine.utility.path_utility import engine_root, get_save_dir
diff --git a/voicevox_engine/app/middlewares.py b/voicevox_engine/app/middlewares.py
index 11aad4d88..3c44a2125 100644
--- a/voicevox_engine/app/middlewares.py
+++ b/voicevox_engine/app/middlewares.py
@@ -9,7 +9,7 @@
 from fastapi.responses import JSONResponse
 from starlette.middleware.errors import ServerErrorMiddleware
 
-from voicevox_engine.setting.Setting import CorsPolicyMode
+from voicevox_engine.setting.model import CorsPolicyMode
 
 
 def configure_middlewares(
diff --git a/voicevox_engine/app/routers/setting.py b/voicevox_engine/app/routers/setting.py
index 94f50a86a..b01bb3049 100644
--- a/voicevox_engine/app/routers/setting.py
+++ b/voicevox_engine/app/routers/setting.py
@@ -6,7 +6,8 @@
 from fastapi.templating import Jinja2Templates
 
 from voicevox_engine.engine_manifest import BrandName
-from voicevox_engine.setting.Setting import CorsPolicyMode, Setting, SettingHandler
+from voicevox_engine.setting.model import CorsPolicyMode
+from voicevox_engine.setting.setting_manager import Setting, SettingHandler
 from voicevox_engine.utility.path_utility import resource_root
 
 from ..dependencies import check_disabled_mutable_api
diff --git a/voicevox_engine/setting/model.py b/voicevox_engine/setting/model.py
new file mode 100644
index 000000000..9ddd07d66
--- /dev/null
+++ b/voicevox_engine/setting/model.py
@@ -0,0 +1,15 @@
+"""
+エンジン設定機能に関して API と ENGINE 内部実装が共有するモデル
+「API と ENGINE 内部実装が共有するモデル」については `voicevox_engine/model.py` の module docstring を確認すること。
+"""
+
+from enum import Enum
+
+
+class CorsPolicyMode(str, Enum):
+    """
+    CORSの許可モード
+    """
+
+    all = "all"  # 全てのオリジンからのリクエストを許可
+    localapps = "localapps"  # ローカルアプリケーションからのリクエストを許可
diff --git a/voicevox_engine/setting/Setting.py b/voicevox_engine/setting/setting_manager.py
similarity index 88%
rename from voicevox_engine/setting/Setting.py
rename to voicevox_engine/setting/setting_manager.py
index 967592d9b..7f0008884 100644
--- a/voicevox_engine/setting/Setting.py
+++ b/voicevox_engine/setting/setting_manager.py
@@ -5,15 +5,7 @@
 from pydantic import BaseModel, Field
 
 from ..utility.path_utility import get_save_dir
-
-
-class CorsPolicyMode(str, Enum):
-    """
-    CORSの許可モード
-    """
-
-    all = "all"  # 全てのオリジンからのリクエストを許可
-    localapps = "localapps"  # ローカルアプリケーションからのリクエストを許可
+from .model import CorsPolicyMode
 
 
 class Setting(BaseModel):