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 6147454..b75b599 100644
--- a/app/src/main/java/com/example/cosmosclient/views/SigninActivity.java
+++ b/app/src/main/java/com/example/cosmosclient/views/SigninActivity.java
@@ -6,9 +6,13 @@
 import android.view.View;
 import android.widget.Button;
 import android.widget.EditText;
+import android.widget.Toast;
 
 import com.example.cosmosclient.R;
 
+import retrofit2.Call;
+import retrofit2.Callback;
+import retrofit2.Response;
 import retrofit2.Retrofit;
 import retrofit2.converter.jackson.JacksonConverterFactory;
 
@@ -27,20 +31,43 @@
         Button ForgotPasswordButton = findViewById(R.id.ForgotPasswordButton);
 
         //retrofitの処理
-        Retrofit retrofit = new Retrofit.Builder()
+        final Retrofit retrofit = new Retrofit.Builder()
                 .baseUrl("nitta-lab-www.is.konan-u.ac.jp")
                 .addConverterFactory(JacksonConverterFactory.create())
                 .build();
         //interfaceから実装を取得
-        Signin signin = retrofit.create(Signin.class);
+        final Signin signin = retrofit.create(Signin.class);
 
         //Sign inボタンの処理
         SigninButton.setOnClickListener(new View.OnClickListener() {
             @Override
             public void onClick(View v) {
-                Intent intent = new Intent(getApplication(), GroupList.class);
-                startActivity(intent);
-                finish();
+                //Intent intent = new Intent(getApplication(), GroupList.class);
+                Call<login> call = signin.loginlist(NameText.getText().toString(), PasswordText.getText().toString());
+
+                call.enqueue(new Callback<login>() {
+                    //成功時
+                    @Override
+                    public void onResponse(Call<login> call, Response<login> response) {
+                        if (response.isSuccessful()) {
+                            login result = response.body();
+                            Intent intent = new Intent(getApplication(), GroupList.class);
+                            //intent.putExtra("UserInfomation",result);
+                            startActivity(intent);
+                            finish();
+
+                        }
+                    }
+
+                    //失敗時
+                    @Override
+                    public void onFailure(Call<login> call, Throwable t) {
+                        //t.printStackTrace();
+                        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);
+                    }
+
+                });
             }
         });