diff --git a/app/src/main/java/com/example/sprout/refactor/activity/BaseActivity.java b/app/src/main/java/com/example/sprout/refactor/activity/BaseActivity.java
new file mode 100644
index 0000000..07c6539
--- /dev/null
+++ b/app/src/main/java/com/example/sprout/refactor/activity/BaseActivity.java
@@ -0,0 +1,68 @@
+package com.example.sprout.refactor.activity;
+
+import android.content.Intent;
+import android.support.v7.app.AppCompatActivity;
+import android.widget.Toast;
+
+import com.example.sprout.refactor.viewmodel.BaseViewModel;
+
+import io.reactivex.android.schedulers.AndroidSchedulers;
+import io.reactivex.disposables.CompositeDisposable;
+import io.reactivex.schedulers.Schedulers;
+
+/**
+ * Activityの基底クラス
+ * Created by matsumoto_k on 2017/12/22.
+ */
+public abstract class BaseActivity extends AppCompatActivity {
+    private CompositeDisposable subscriptions = null;
+
+    @Override
+    protected void onResume() {
+        super.onResume();
+        subscriptions = new CompositeDisposable();
+    }
+
+    /**
+     * 引数のObservableに対してsubscribeする
+     *
+     * @param baseViewModel BaseViewModelを継承したクラスを引数に渡す
+     */
+    protected void addUiObserver(BaseViewModel baseViewModel) {
+        subscriptions.add(
+                baseViewModel.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(
+                baseViewModel.getNavigationMessenger()
+                        .observeOn(Schedulers.computation())
+                        .subscribe(navigationMessage -> {
+                            switch (navigationMessage.getType()) {
+                                case Start:
+                                    startActivity(new Intent(BaseActivity.this, navigationMessage.getClazz()));
+                                    break;
+                                case Finsih:
+                                    finish();
+                            }
+                        })
+        );
+    }
+
+    /**
+     * disposeする
+     */
+    protected void removeUiObserver() {
+        subscriptions.dispose();
+    }
+}