diff --git a/app/src/main/java/org/ntlab/amaryllis/client/fragment/AccountFragment.java b/app/src/main/java/org/ntlab/amaryllis/client/fragment/AccountFragment.java
index c12eed2..6766874 100644
--- a/app/src/main/java/org/ntlab/amaryllis/client/fragment/AccountFragment.java
+++ b/app/src/main/java/org/ntlab/amaryllis/client/fragment/AccountFragment.java
@@ -1,14 +1,29 @@
 package org.ntlab.amaryllis.client.fragment;
 
+import android.content.Intent;
 import android.os.Bundle;
 
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
 import androidx.fragment.app.Fragment;
-
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
+import android.widget.Button;
 
+import org.ntlab.amaryllis.client.Amaryllis;
+import org.ntlab.amaryllis.client.MainActivity;
 import org.ntlab.amaryllis.client.R;
+import org.ntlab.amaryllis.client.SignUpActivity;
+import org.ntlab.amaryllis.client.entities.SignUpJson;
+import org.ntlab.amaryllis.client.resources.AccountsRest;
+
+
+import retrofit2.Call;
+import retrofit2.Callback;
+import retrofit2.Response;
+import retrofit2.Retrofit;
+import retrofit2.converter.jackson.JacksonConverterFactory;
 
 /**
  * A simple {@link Fragment} subclass.
@@ -25,7 +40,9 @@
     // TODO: Rename and change types of parameters
     private String mParam1;
     private String mParam2;
+    Button logoutButton;
 
+    private static final int READ_REQUEST_CODE = 42;
     public AccountFragment() {
         // Required empty public constructor
     }
@@ -56,11 +73,32 @@
             mParam2 = getArguments().getString(ARG_PARAM2);
         }
     }
+    @Override
+    public void onViewCreated(@NonNull View view, @Nullable Bundle savedInstanceState) {
+        super.onViewCreated(view, savedInstanceState);
+        Retrofit retrofit = new Retrofit.Builder()
+                .baseUrl("http://nitta-lab-www.is.konan-u.ac.jp/amaryllis/")
+                .addConverterFactory(JacksonConverterFactory.create())
+                .build();
+        logoutButton = (Button)view.findViewById(R.id.logout);
+        logoutButton.setOnClickListener(new View.OnClickListener() {
+
+           public void onClick(View v) {
+                Amaryllis amaryllis =(Amaryllis) getActivity().getApplication();
+                amaryllis.setUid(null);
+                amaryllis.setPassword(null);
+                Intent intent = new Intent(getActivity().getApplication(), SignUpActivity.class);
+                getContext().startActivity(intent);
+            }
+            });
+
+    }
 
     @Override
     public View onCreateView(LayoutInflater inflater, ViewGroup container,
                              Bundle savedInstanceState) {
         // Inflate the layout for this fragment
+
         return inflater.inflate(R.layout.fragment_account, container, false);
     }
 }
\ No newline at end of file