diff --git a/app/src/main/java/org/ntlab/radishforandroidstudio/sample/SampleActivity.java b/app/src/main/java/org/ntlab/radishforandroidstudio/sample/SampleActivity.java
index 28c21ac..a8c5953 100644
--- a/app/src/main/java/org/ntlab/radishforandroidstudio/sample/SampleActivity.java
+++ b/app/src/main/java/org/ntlab/radishforandroidstudio/sample/SampleActivity.java
@@ -118,6 +118,22 @@
                 System.out.println("down-button");
             }
         });
+        //left_button操作
+        Button left_button = findViewById(R.id.left_button);
+        left_button.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                System.out.println("left_button");
+            }
+        });
+        //right_button操作
+        Button right_button = findViewById(R.id.right_button);
+        right_button.setOnClickListener(new View.OnClickListener() {
+            @Override
+            public void onClick(View v) {
+                System.out.println("right_button");
+            }
+        });
     }
 
     @Override
diff --git a/app/src/main/res/layout/button_layout.xml b/app/src/main/res/layout/button_layout.xml
index 9b80d5d..cb143fa 100644
--- a/app/src/main/res/layout/button_layout.xml
+++ b/app/src/main/res/layout/button_layout.xml
@@ -3,32 +3,29 @@
     xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
-    android:layout_height="match_parent"
-    tools:layout_editor_absoluteY="81dp">
+    android:layout_height="match_parent">
 
     <Button
         android:id="@+id/top_button"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:layout_marginBottom="8dp"
-        android:layout_marginEnd="8dp"
-        android:layout_marginLeft="16dp"
-        android:layout_marginRight="8dp"
-        android:layout_marginStart="16dp"
-        android:layout_marginTop="8dp"
+
+        android:layout_marginBottom="120dp"
+        android:layout_marginLeft="33dp"
+        android:layout_marginStart="33dp"
         android:text="うえ"
-        app:layout_constraintBottom_toTopOf="@+id/down_button"
-        app:layout_constraintEnd_toEndOf="parent"
-        app:layout_constraintHorizontal_bias="0.0"
-        app:layout_constraintStart_toStartOf="parent"
-        app:layout_constraintTop_toBottomOf="@+id/textView2"
-        app:layout_constraintVertical_bias="1.0" />
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintStart_toStartOf="@+id/left_button" />
 
     <TextView
         android:id="@+id/textView2"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:layout_marginTop="78dp"
+        android:layout_marginEnd="8dp"
+        android:layout_marginLeft="8dp"
+        android:layout_marginRight="8dp"
+        android:layout_marginStart="8dp"
+        android:layout_marginTop="68dp"
         android:text="Cactus"
         android:textColor="@android:color/background_light"
         android:textSize="30sp"
@@ -40,11 +37,31 @@
         android:id="@+id/down_button"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:layout_marginBottom="16dp"
-        android:layout_marginLeft="16dp"
-        android:layout_marginStart="16dp"
+
+        android:layout_marginLeft="42dp"
+        android:layout_marginStart="42dp"
         android:text="した"
-        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintStart_toStartOf="@+id/left_button"
+        app:layout_constraintTop_toBottomOf="@+id/left_button" />
+
+    <Button
+        android:id="@+id/left_button"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+
+        android:layout_marginLeft="28dp"
+        android:layout_marginStart="28dp"
+        android:text="ひだり"
+        app:layout_constraintBaseline_toBaselineOf="@+id/right_button"
         app:layout_constraintStart_toStartOf="parent" />
 
+    <Button
+        android:id="@+id/right_button"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+
+        android:text="みぎ"
+        app:layout_constraintStart_toEndOf="@+id/left_button"
+        app:layout_constraintTop_toBottomOf="@+id/top_button" />
+
 </android.support.constraint.ConstraintLayout>