diff --git a/backend/app/Http/Controllers/Api/MeetingImagesController.php b/backend/app/Http/Controllers/Api/MeetingImagesController.php
index 78879be8..7e0dc4d1 100644
--- a/backend/app/Http/Controllers/Api/MeetingImagesController.php
+++ b/backend/app/Http/Controllers/Api/MeetingImagesController.php
@@ -17,7 +17,7 @@ class MeetingImagesController extends Controller {
         }
 
         if (MeetingImage::select('id')->where('meeting_id', (int)$r->meeting_id)->count() >= 10) {
-            return ['status_code' => 400, 'error_messages' => 'エラーメッセージ'];
+            return ['status_code' => 400, 'error_messages' => '画像は最大10個までです。'];
         }
 
         // ファイルサイズは10MiB以内