diff --git a/files/ja/web/javascript/reference/global_objects/map/index.md b/files/ja/web/javascript/reference/global_objects/map/index.md
index ac5427cbdfb4f5..757df631d24665 100644
--- a/files/ja/web/javascript/reference/global_objects/map/index.md
+++ b/files/ja/web/javascript/reference/global_objects/map/index.md
@@ -311,8 +311,8 @@ const keyFunc = function () {};
 
 // 値を設定する
 myMap.set(keyString, "'文字列' と結び付けられた値");
-myMap.set(keyObj, 'keyObj と結び付けられた値');
-myMap.set(keyFunc, 'keyFunc と結び付けられた値');
+myMap.set(keyObj, "keyObj と結び付けられた値");
+myMap.set(keyFunc, "keyFunc と結び付けられた値");
 
 console.log(myMap.size); // 3