diff --git a/app/src/main/java/org/ntlab/irisclient/DrawingActivity.java b/app/src/main/java/org/ntlab/irisclient/DrawingActivity.java
index a4010c5..28ad776 100644
--- a/app/src/main/java/org/ntlab/irisclient/DrawingActivity.java
+++ b/app/src/main/java/org/ntlab/irisclient/DrawingActivity.java
@@ -11,6 +11,7 @@
 import android.view.View;
 import android.view.WindowManager;
 import android.widget.CompoundButton;
+import android.widget.ImageButton;
 import android.widget.SeekBar;
 import android.widget.TextView;
 import android.widget.ToggleButton;
@@ -30,6 +31,8 @@
     private Integer drawingNow = 0;
     private Integer nowTime;
     private ToggleButton okToggleButton;
+    private ImageButton blackPen;
+    private ImageButton eraser;
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
@@ -46,8 +49,8 @@
         drawingStateViewModel= new ViewModelProvider(this).get(DrawingStateViewModel.class);
 
         findViewById(R.id.clearButton).setOnClickListener(this);//画面クリアボタン
-        findViewById(R.id.eraserButton).setOnClickListener(this);//消しゴムボタン
-        findViewById(R.id.blackPenButton).setOnClickListener(this);//消しゴムボタン
+        blackPen = findViewById(R.id.blackPenButton);
+        eraser = findViewById(R.id.eraserButton);
 
         //完了ボタン
         okToggleButton = (ToggleButton) findViewById(R.id.toggleButton);
@@ -79,6 +82,7 @@
         TextView textAlpha =(TextView)findViewById(R.id.alphaText);
         textPenSize.setText("サイズ: 10%");
         textAlpha.setText("透明度: 255%");
+
         //筆の大きさを変えるシークバー
         SeekBar seekbar = findViewById(R.id.seekBar);
         seekbar.setOnSeekBarChangeListener(new SeekBar.OnSeekBarChangeListener() {
@@ -120,6 +124,7 @@
         TextView textMemberNum = (TextView)findViewById(R.id.drawingNowText);//残りのイラスト枚数のTextView
         TextView timerText = (TextView)findViewById(R.id.timerText);//TimerのTextView
 
+
         drawingCanvas = (DrawingCanvas) findViewById(R.id.drawingCanvas);
 
         //残りのイラスト枚数の表示
@@ -192,8 +197,11 @@
                 drawingCanvas.clearCanvas();
             } else if (v.getId() == R.id.eraserButton) {//eraserButtonが押されたときの処理
                 drawingCanvas.setColor(Color.WHITE);
+                eraser.setBackgroundResource(R.drawable.border);
+                blackPen.setBackgroundColor(Color.WHITE);
             } else if (v.getId() == R.id.blackPenButton) {
                 drawingCanvas.setColor(Color.BLACK);
+                blackPen.setBackgroundResource(R.drawable.border);
             }
         }
     }