diff --git a/app/src/main/java/com/example/cosmosclient/app/Cosmos.java b/app/src/main/java/com/example/cosmosclient/app/Cosmos.java
index c3a6f88..632820b 100644
--- a/app/src/main/java/com/example/cosmosclient/app/Cosmos.java
+++ b/app/src/main/java/com/example/cosmosclient/app/Cosmos.java
@@ -4,9 +4,6 @@
 
 import com.example.cosmosclient.entities.Group;
 
-import java.util.ArrayList;
-import java.util.List;
-
 public class Cosmos extends Application {
     private String token=null;
     private Group curGroup=null;
diff --git a/app/src/main/java/com/example/cosmosclient/resources/GroupsRest.java b/app/src/main/java/com/example/cosmosclient/resources/GroupsRest.java
index 37aa411..52bbefd 100644
--- a/app/src/main/java/com/example/cosmosclient/resources/GroupsRest.java
+++ b/app/src/main/java/com/example/cosmosclient/resources/GroupsRest.java
@@ -8,7 +8,7 @@
 import retrofit2.http.POST;
 
 public interface GroupsRest {
-    @POST
+    @POST("groups")
     @FormUrlEncoded
     Call<Group> createGroup(@Field("name") String name,@Field("uId") String uId,@Field("token") String token);
 }
diff --git a/app/src/main/java/com/example/cosmosclient/resources/UsersRest.java b/app/src/main/java/com/example/cosmosclient/resources/UsersRest.java
index b8321c2..9823918 100644
--- a/app/src/main/java/com/example/cosmosclient/resources/UsersRest.java
+++ b/app/src/main/java/com/example/cosmosclient/resources/UsersRest.java
@@ -2,10 +2,12 @@
 
 import com.example.cosmosclient.entities.SigninResponse;
 import com.example.cosmosclient.entities.SignupResponse;
+import com.example.cosmosclient.entities.User;
 
 import retrofit2.Call;
 import retrofit2.http.Field;
 import retrofit2.http.FormUrlEncoded;
+import retrofit2.http.GET;
 import retrofit2.http.POST;
 import retrofit2.http.Path;
 import retrofit2.http.Query;
@@ -18,6 +20,7 @@
     @FormUrlEncoded
     Call<SignupResponse> createUser(@Field("name") String name, @Field("pw") String pw, @Field("icon-image") String icon_image);
 
-
-
+    @GET("users/{uId}")
+    @FormUrlEncoded
+    Call<User> getUserInfo(@Path("uId") String uId, @Field("token") String token);
 }
diff --git a/app/src/main/java/com/example/cosmosclient/views/GroupListActivity.java b/app/src/main/java/com/example/cosmosclient/views/GroupListActivity.java
index c7515bf..645e943 100644
--- a/app/src/main/java/com/example/cosmosclient/views/GroupListActivity.java
+++ b/app/src/main/java/com/example/cosmosclient/views/GroupListActivity.java
@@ -86,6 +86,8 @@
         // Handle navigation view item clicks here.
         int id = item.getItemId();
         if ( id == R.id.createNewGroupButton){
+            Intent intent=new Intent(GroupListActivity.this,com.example.cosmosclient.views.MakeGroupActivity.class);
+            startActivity(intent);
 
         } else if (id == R.id.joinGroupButton){
             Intent intent=new Intent(GroupListActivity.this, com.example.cosmosclient.views.JoinGroupActionsActivity.class);
diff --git a/app/src/main/java/com/example/cosmosclient/views/MakeGroupActivity.java b/app/src/main/java/com/example/cosmosclient/views/MakeGroupActivity.java
index a512d1d..93ea859 100644
--- a/app/src/main/java/com/example/cosmosclient/views/MakeGroupActivity.java
+++ b/app/src/main/java/com/example/cosmosclient/views/MakeGroupActivity.java
@@ -6,12 +6,23 @@
 import android.view.View;
 import android.widget.Button;
 import android.widget.EditText;
+import android.widget.Toast;
 
 import com.example.cosmosclient.R;
+import com.example.cosmosclient.app.Cosmos;
 import com.example.cosmosclient.entities.Group;
+import com.example.cosmosclient.entities.SignupResponse;
+import com.example.cosmosclient.entities.User;
 import com.example.cosmosclient.resources.GroupsRest;
 import com.example.cosmosclient.resources.UsersRest;
+import com.example.cosmosclient.retrofitsample.Ele;
 
+import java.io.IOError;
+import java.io.IOException;
+
+import retrofit2.Call;
+import retrofit2.Callback;
+import retrofit2.Response;
 import retrofit2.Retrofit;
 import retrofit2.converter.jackson.JacksonConverterFactory;
 
@@ -22,9 +33,16 @@
         super.onCreate(savedInstanceState);
         setContentView(R.layout.activity_make_group);
 
-        EditText gruopNameText = findViewById(R.id.groupNameText);
+        final EditText gruopNameText = findViewById(R.id.groupNameText);
         Button createGroupButton = findViewById(R.id.createGroupButton);
-        String name,uId;
+        String name;
+        final String uId,token;
+
+        //グループ作成に必要な情報の取得
+        Cosmos app = (Cosmos) getApplication();
+        uId = app.getuId();
+        //token = app.getToken();
+        token="abcdef";
 
         //retrofitの処理
         final Retrofit retrofit = new Retrofit.Builder()
@@ -32,11 +50,43 @@
                 .addConverterFactory(JacksonConverterFactory.create())
                 .build();
         //interfaceから実装を取得
-        final GroupsRest makeGroupService = retrofit.create(Group.class);
+        final GroupsRest makeGroupService = retrofit.create(GroupsRest.class);
 
         createGroupButton.setOnClickListener(new View.OnClickListener(){
             @Override
             public void onClick(View view){
+                try {
+                    Call<Group> createGroup = makeGroupService.createGroup(gruopNameText.getText().toString(), uId, token);
+
+                    createGroup.enqueue(new Callback<Group>() {
+                        @Override
+                        public void onResponse(Call<Group> call, Response<Group> response) {
+                            if (response.isSuccessful()) {
+                                Group result = response.body();
+
+                                System.out.println(result.getgId());
+                                System.out.println(result.getName());
+                                System.out.println(result.getRequests());
+                                System.out.println(result.getUri());
+                                System.out.println(result.getgId());
+
+                                Toast.makeText(MakeGroupActivity.this, "グループを作成しました", Toast.LENGTH_SHORT).show();
+
+                                finish();
+
+                            } else {
+                                System.out.println("");
+                            }
+                        }
+
+                        @Override
+                        public void onFailure(Call<Group> call, Throwable t) {
+                            t.printStackTrace();
+                        }
+                    });
+                }catch(Exception e){
+                    e.printStackTrace();
+                }
 
             }
         });
diff --git a/app/src/main/java/com/example/cosmosclient/views/SignupActivity.java b/app/src/main/java/com/example/cosmosclient/views/SignupActivity.java
index cb93173..c0fa64f 100644
--- a/app/src/main/java/com/example/cosmosclient/views/SignupActivity.java
+++ b/app/src/main/java/com/example/cosmosclient/views/SignupActivity.java
@@ -112,13 +112,13 @@
 
                             startActivity(intent);
                             Toast.makeText(SignupActivity.this,
-                                    "アカウントを作成しました", Toast.LENGTH_SHORT);
+                                    "アカウントを作成しました", Toast.LENGTH_SHORT).show();
                             finish();
 
                         } else {
                             //onFailureでキャッチできないエラー用
                             Toast.makeText(SignupActivity.this,
-                                    "アカウント作成失敗", Toast.LENGTH_SHORT);
+                                    "アカウント作成失敗", Toast.LENGTH_SHORT).show();
                         }
                     }
 
@@ -127,7 +127,7 @@
                     public void onFailure(Call<SignupResponse> call, Throwable t) {
                         t.printStackTrace();
                         Toast.makeText(SignupActivity.this,
-                                "アカウント作成失敗", Toast.LENGTH_SHORT);
+                                "アカウント作成失敗", Toast.LENGTH_SHORT).show();
                     }
                 });
             }