diff --git a/app/src/main/java/com/example/sprout/refactor/activity/RoomCreateActivity.java b/app/src/main/java/com/example/sprout/refactor/activity/RoomCreateActivity.java
index 746e6f1..b8d890e 100644
--- a/app/src/main/java/com/example/sprout/refactor/activity/RoomCreateActivity.java
+++ b/app/src/main/java/com/example/sprout/refactor/activity/RoomCreateActivity.java
@@ -1,27 +1,19 @@
 package com.example.sprout.refactor.activity;
 
-import android.content.Intent;
 import android.databinding.DataBindingUtil;
 import android.os.Bundle;
-import android.support.v7.app.AppCompatActivity;
-import android.widget.Toast;
 
 import com.example.sprout.R;
 import com.example.sprout.databinding.RfActivityRoomCreateBinding;
 import com.example.sprout.refactor.viewmodel.RoomCreateViewModel;
 
-import io.reactivex.android.schedulers.AndroidSchedulers;
-import io.reactivex.disposables.CompositeDisposable;
-import io.reactivex.schedulers.Schedulers;
-
 /**
  * ルーム作成のActivity
  *
  * @author matsumoto_k
  */
-public class RoomCreateActivity extends AppCompatActivity {
+public class RoomCreateActivity extends BaseActivity {
 
-    private CompositeDisposable subscriptions = null;
     private RoomCreateViewModel roomCreateViewModel = null;
     private RfActivityRoomCreateBinding binding = null;
 
@@ -37,39 +29,6 @@
     @Override
     protected void onResume() {
         super.onResume();
-        subscribe();
-    }
-
-    private void subscribe() {
-        subscriptions = new CompositeDisposable();
-        // トーストの購読
-        subscriptions.add(
-                roomCreateViewModel.getToastMessanger()
-                        .observeOn(AndroidSchedulers.mainThread())
-                        .subscribe(toastMessage -> {
-                            switch (toastMessage.getLength()) {
-                                case SHORT:
-                                    Toast.makeText(this, toastMessage.getMessage(), Toast.LENGTH_SHORT).show();
-                                    break;
-                                case LONG:
-                                    Toast.makeText(this, toastMessage.getMessage(), Toast.LENGTH_LONG).show();
-                                    break;
-                            }
-                        })
-        );
-        // 画面遷移の購読
-        subscriptions.add(
-                roomCreateViewModel.getNavigationMessenger()
-                        .observeOn(Schedulers.computation())
-                        .subscribe(navigationMessage -> {
-                            switch (navigationMessage.getType()) {
-                                case Start:
-                                    startActivity(new Intent(RoomCreateActivity.this, navigationMessage.getClazz()));
-                                    break;
-                                case Finsih:
-                                    finish();
-                            }
-                        })
-        );
+        addUiObserver(roomCreateViewModel);
     }
 }
diff --git a/app/src/main/java/com/example/sprout/refactor/viewmodel/RoomCreateViewModel.java b/app/src/main/java/com/example/sprout/refactor/viewmodel/RoomCreateViewModel.java
index 6d455b8..578e662 100644
--- a/app/src/main/java/com/example/sprout/refactor/viewmodel/RoomCreateViewModel.java
+++ b/app/src/main/java/com/example/sprout/refactor/viewmodel/RoomCreateViewModel.java
@@ -4,7 +4,6 @@
 import android.databinding.ObservableField;
 
 import com.example.sprout.refactor.activity.RoomMainActivity;
-import com.example.sprout.refactor.contract.ViewContract;
 import com.example.sprout.refactor.messengers.NavigationMessage;
 import com.example.sprout.refactor.messengers.ToastMessage;
 import com.example.sprout.refactor.model.ModelLocator;
@@ -24,7 +23,7 @@
     private ObservableField<String> roomName = new ObservableField<>("");
     private ObservableField<String> pass = new ObservableField<>("");
     private ObservableBoolean hasPass = new ObservableBoolean(false);
-    private CompositeDisposable subscriptions = null;
+
     public RoomCreateViewModel() {
     }
 
@@ -44,12 +43,6 @@
         );
     }
 
-    @Override
-    public void onPause() {
-        super.onPause();
-        subscriptions.dispose();
-    }
-
     /**
      * ルーム作成クリック
      *