diff --git a/app/src/main/java/com/example/cosmosclient/views/SigninActivity.java b/app/src/main/java/com/example/cosmosclient/views/SigninActivity.java
index 47babd5..de06c2c 100644
--- a/app/src/main/java/com/example/cosmosclient/views/SigninActivity.java
+++ b/app/src/main/java/com/example/cosmosclient/views/SigninActivity.java
@@ -62,7 +62,7 @@
 
                         }else{
                             Toast.makeText(SigninActivity.this,
-                                    "ユーザIDもしくはパスワードが間違っています",Toast.LENGTH_SHORT).show();
+                                    "通信エラー",Toast.LENGTH_SHORT).show();
                         }
                     }