diff --git a/backend/app/Http/Controllers/Api/MeetingApprovalsController.php b/backend/app/Http/Controllers/Api/MeetingApprovalsController.php
index ea720586..a317117c 100644
--- a/backend/app/Http/Controllers/Api/MeetingApprovalsController.php
+++ b/backend/app/Http/Controllers/Api/MeetingApprovalsController.php
@@ -55,7 +55,7 @@ class MeetingApprovalsController extends Controller {
             return ['status_code' => 400, 'error_messages' => ['承認に失敗しました。']];
         }
 
-        if (null === (MeetingApprovals::where('id', (int)$r->meeting_id)->where('child_id', (int)$r->child_id)->first())) {
+        if (null === (MeetingApprovals::where('meeting_id', (int)$r->meeting_id)->where('child_id', (int)$r->child_id)->first())) {
             return ['status_code' => 400, 'error_messages' => ['承認に失敗しました。']];
         }