diff --git a/app/src/main/java/org/ntlab/amaryllis/client/LoginActivity.java b/app/src/main/java/org/ntlab/amaryllis/client/LoginActivity.java
index 8b210d4..8fe1519 100644
--- a/app/src/main/java/org/ntlab/amaryllis/client/LoginActivity.java
+++ b/app/src/main/java/org/ntlab/amaryllis/client/LoginActivity.java
@@ -10,6 +10,7 @@
 import android.widget.Button;
 import android.widget.EditText;
 import android.widget.TextView;
+import android.widget.Toast;
 
 import org.ntlab.amaryllis.client.entities.SignUpJson;
 import org.ntlab.amaryllis.client.resources.AccountsRest;
@@ -50,15 +51,20 @@
                 call.enqueue(new Callback<SignUpJson>(){
                     @Override
                     public void onResponse(Call<SignUpJson> call, Response<SignUpJson> response) {
-                        SignUpJson signUpJson =response.body();
-                        Amaryllis app = (Amaryllis) getApplication();
-                        app.setToken(signUpJson.getToken());
-                        app.setUid(nameText.getText().toString());
-                        app.setPassword(passWordEditText.getText().toString());
-                        app.setName(nameText.getText().toString());
-                        Intent intent = new Intent(getApplication(), MainActivity.class);
-                        startActivity(intent);
-                        finish();
+                        if (response.isSuccessful()) {
+                            SignUpJson signUpJson =response.body();
+                            Amaryllis app = (Amaryllis) getApplication();
+                            app.setToken(signUpJson.getToken());
+                            app.setUid(nameText.getText().toString());
+                            app.setPassword(passWordEditText.getText().toString());
+                            app.setName(nameText.getText().toString());
+                            Intent intent = new Intent(getApplication(), MainActivity.class);
+                            startActivity(intent);
+                            finish();
+                        }else {
+                            Toast.makeText(LoginActivity.this,
+                                    "nameもしくはパスワードが違います", Toast.LENGTH_SHORT).show();
+                        }
                     }
 
                     @Override