diff --git a/ecs/jskult-webapp/src/services/master_mainte_service.py b/ecs/jskult-webapp/src/services/master_mainte_service.py
index 8d37d182..17a3c4a4 100644
--- a/ecs/jskult-webapp/src/services/master_mainte_service.py
+++ b/ecs/jskult-webapp/src/services/master_mainte_service.py
@@ -161,6 +161,8 @@ class MasterMainteService(BaseService):
         bucket_name = environment.MASTER_MAINTENANCE_BUCKET
         file_key = f'data/{os.path.basename(local_file_path)}'
         self.s3_client.upload_file(local_file_path, bucket_name, file_key)
+        # アップロード後、ローカルからは削除する
+        self.delete_local_file(local_file_path)
 
     def generate_download_file_url(self, local_file_path: str) -> str:
         bucket_name = environment.MASTER_MAINTENANCE_BUCKET
@@ -177,3 +179,6 @@ class MasterMainteService(BaseService):
         else:
             raise Exception(f'登録テーブルの選択値が不正です: {select_table}')
         return (table_name, selected_table_msg)
+
+    def delete_local_file(self, local_file_path: str):
+        os.remove(local_file_path)