diff --git a/app/src/main/java/com/example/sprout/refactor/adapter/RoomMainAdapter.java b/app/src/main/java/com/example/sprout/refactor/adapter/RoomMainAdapter.java
index 837a948..4a5e401 100644
--- a/app/src/main/java/com/example/sprout/refactor/adapter/RoomMainAdapter.java
+++ b/app/src/main/java/com/example/sprout/refactor/adapter/RoomMainAdapter.java
@@ -2,7 +2,6 @@
 
 import android.content.Context;
 import android.databinding.DataBindingUtil;
-import android.support.v7.util.DiffUtil;
 import android.support.v7.widget.RecyclerView;
 import android.view.LayoutInflater;
 import android.view.ViewGroup;
@@ -12,7 +11,6 @@
 import com.example.sprout.refactor.model.entity.Member;
 
 import java.util.ArrayList;
-import java.util.List;
 
 /**
  * ルームのアダプター
@@ -46,10 +44,9 @@
     }
 
     public void setDataAndRefresh(ArrayList<Member> items) {
-        List<Member> oldItems = this.items;
-        DiffUtil.DiffResult diffResult = DiffUtil.calculateDiff(new MemberDiffCallBack(oldItems, items));
+        this.items.clear();
         this.items = items;
-        diffResult.dispatchUpdatesTo(this);
+        notifyDataSetChanged();
     }
 
     @Override