diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7640bd86f2..15be6a5e00 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,7 +4,7 @@
 -
 
 ### Client
--
+- Fix: バナー画像の幅が表示領域と一致していない問題を修正
 
 ### Server
 -
diff --git a/packages/frontend/src/pages/user/home.vue b/packages/frontend/src/pages/user/home.vue
index 7094aca7c0..78730b1811 100644
--- a/packages/frontend/src/pages/user/home.vue
+++ b/packages/frontend/src/pages/user/home.vue
@@ -382,6 +382,7 @@ onDeactivated(disposeBannerParallaxResizeObserver);
 						left: 0;
 						width: 100%;
 						height: 300%;
+						background-size: 100% auto;
 						background-color: #4c5e6d;
 						background-repeat: repeat-y;
 						background-position: center;