diff --git a/app/src/main/java/org/ntlab/acanthus_client/views/paint/PaintActivity.java b/app/src/main/java/org/ntlab/acanthus_client/views/paint/PaintActivity.java
index d213476..16f5e75 100644
--- a/app/src/main/java/org/ntlab/acanthus_client/views/paint/PaintActivity.java
+++ b/app/src/main/java/org/ntlab/acanthus_client/views/paint/PaintActivity.java
@@ -9,6 +9,8 @@
 import android.view.View;
 import android.widget.TextView;
 
+import com.google.android.material.bottomnavigation.BottomNavigationView;
+
 import org.ntlab.acanthus_client.Acanthus;
 import org.ntlab.acanthus_client.R;
 import org.ntlab.acanthus_client.databinding.ActivityPaintBinding;
@@ -18,6 +20,7 @@
 public class PaintActivity extends AppCompatActivity {
 
     private PaintCanvas paintCanvas;
+    private PaintToolBar paintToolBar;
     private ActivityPaintBinding binding;
     private PaintViewModel paintViewModel;
 
@@ -85,6 +88,7 @@
         paintCanvas = (PaintCanvas) findViewById(R.id.myCanvas);
         paintCanvas.setPaintViewModel(paintViewModel);
 
+        paintToolBar = new PaintToolBar(this, paintCanvas);
 
     }
 
diff --git a/app/src/main/java/org/ntlab/acanthus_client/views/paint/PaintToolBar.java b/app/src/main/java/org/ntlab/acanthus_client/views/paint/PaintToolBar.java
new file mode 100644
index 0000000..6ea82bf
--- /dev/null
+++ b/app/src/main/java/org/ntlab/acanthus_client/views/paint/PaintToolBar.java
@@ -0,0 +1,66 @@
+package org.ntlab.acanthus_client.views.paint;
+
+import android.content.Intent;
+import android.graphics.Paint;
+import android.view.MenuItem;
+
+import androidx.annotation.NonNull;
+import androidx.appcompat.app.AppCompatActivity;
+
+import com.google.android.material.bottomnavigation.BottomNavigationView;
+
+import org.ntlab.acanthus_client.Acanthus;
+import org.ntlab.acanthus_client.R;
+import org.ntlab.acanthus_client.views.MainActivity;
+
+//-----------------------------------------------------------------
+//　描画シーンの下部のツールバー
+public class PaintToolBar {
+    private BottomNavigationView bottomNavigationView;
+    private BottomNavigationView.OnNavigationItemSelectedListener onNavigationItemSelectedListener;
+
+    //-----------------------------------------------------------------
+    //-----------------------------------------------------------------
+    public PaintToolBar(AppCompatActivity appCompatActivity, PaintCanvas paintCanvas) {
+        this.bottomNavigationView = (BottomNavigationView) appCompatActivity.findViewById(R.id.navPaint);
+
+        setNavigationListener(appCompatActivity, paintCanvas);
+    }
+
+    //-----------------------------------------------------------------
+    //-----------------------------------------------------------------
+    // ナビゲーションバーのタッチ監視
+    private void setNavigationListener(AppCompatActivity appCompatActivity, PaintCanvas paintCanvas) {
+        this.onNavigationItemSelectedListener = new BottomNavigationView.OnNavigationItemSelectedListener() {
+            @Override
+            public boolean onNavigationItemSelected(@NonNull MenuItem item) {
+                switch (item.getItemId()) {
+                    //-----------------------------------------------------------------
+                    //
+                    case R.id.navigation_clear:
+                        paintCanvas.clearCanvas();
+                        return true;
+                    //-----------------------------------------------------------------
+                    //
+                    case R.id.navigation_invite:
+                        transitionInviteActivity(appCompatActivity);
+                        return true;
+                }
+
+                return true;
+            }
+        };
+
+        bottomNavigationView.setOnNavigationItemSelectedListener(this.onNavigationItemSelectedListener);
+    }
+
+    //-----------------------------------------------------------------
+    // 招待ページへ移動
+    private void transitionInviteActivity(AppCompatActivity appCompatActivity) {
+        Acanthus acanthus = (Acanthus) appCompatActivity.getApplication();
+        Intent intent = new Intent(acanthus, MainActivity.class);
+        appCompatActivity.startActivity(intent);
+    }
+    //-----------------------------------------------------------------
+
+}
diff --git a/app/src/main/res/layout/activity_paint.xml b/app/src/main/res/layout/activity_paint.xml
index d0a2f8f..93059f5 100644
--- a/app/src/main/res/layout/activity_paint.xml
+++ b/app/src/main/res/layout/activity_paint.xml
@@ -10,11 +10,13 @@
 
     <org.ntlab.acanthus_client.views.paint.PaintCanvas
         android:id="@+id/myCanvas"
-        android:layout_width="match_parent"
-        android:layout_height="match_parent"
+        android:layout_width="411dp"
+        android:layout_height="674dp"
         android:layout_weight="1"
-        tools:layout_editor_absoluteX="-16dp"
-        tools:layout_editor_absoluteY="-16dp" />
+        app:layout_constraintBottom_toTopOf="@+id/navPaint"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
 
     <Button
         android:id="@+id/button_clear"
@@ -23,7 +25,9 @@
         android:onClick="onClickClear"
         android:text="clear"
         app:layout_constraintBottom_toBottomOf="@+id/myCanvas"
-        app:layout_constraintEnd_toEndOf="parent" />
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintHorizontal_bias="1.0"
+        app:layout_constraintStart_toStartOf="parent" />
 
     <Button
         android:id="@+id/button_Invite"
@@ -70,6 +74,17 @@
         app:layout_constraintTop_toTopOf="parent"
         app:layout_constraintVertical_bias="0.213" />
 
+    <com.google.android.material.bottomnavigation.BottomNavigationView
+        android:id="@+id/navPaint"
+        android:layout_width="410dp"
+        android:layout_height="54dp"
+        android:background="#FFFFFF"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:labelVisibilityMode="labeled"
+        app:menu="@menu/bottom_nav_paint" />
+
     <Button
         android:id="@+id/button_keep"
         android:layout_width="50dp"
diff --git a/app/src/main/res/menu/bottom_nav_paint.xml b/app/src/main/res/menu/bottom_nav_paint.xml
new file mode 100644
index 0000000..f59c79c
--- /dev/null
+++ b/app/src/main/res/menu/bottom_nav_paint.xml
@@ -0,0 +1,20 @@
+<?xml version="1.0" encoding="utf-8"?>
+<menu xmlns:android="http://schemas.android.com/apk/res/android">
+
+    <item
+        android:id="@+id/navigation_pen"
+        android:icon="@android:drawable/ic_menu_edit"
+        android:title="pen" />
+    <item
+        android:id="@+id/navigation_clear"
+        android:icon="@android:drawable/ic_menu_close_clear_cancel"
+        android:title="clear" />
+    <item
+        android:id="@+id/navigation_invite"
+        android:icon="@android:drawable/ic_menu_myplaces"
+        android:title="invite" />
+    <item
+        android:id="@+id/navigation_page"
+        android:icon="?attr/actionModeCopyDrawable"
+        android:title="page" />
+</menu>
\ No newline at end of file