diff --git a/app/src/main/java/org/ntlab/acanthus_client/views/paint/page/PageActivity.java b/app/src/main/java/org/ntlab/acanthus_client/views/paint/page/PageActivity.java
index 52f50d2..20ed231 100644
--- a/app/src/main/java/org/ntlab/acanthus_client/views/paint/page/PageActivity.java
+++ b/app/src/main/java/org/ntlab/acanthus_client/views/paint/page/PageActivity.java
@@ -136,6 +136,7 @@
     //-----------------------------------------------------------------
     //
     private void startObserve() {
+        // ページの現在の番号
         pageViewModel.getCurPageNo().observe(this, new Observer<Integer>() {
             @Override
             public void onChanged(Integer pageNo) {
@@ -145,6 +146,7 @@
             }
         });
 
+        // ページのサムネ更新
         pageViewModel.getPages().observe(this, new Observer<HashMap<Integer, String>>() {
             @Override
             public void onChanged(HashMap<Integer, String> s) {
@@ -154,6 +156,14 @@
                 Log.d("a", "onFailure: -----------------------OK:Obs");
             }
         });
+
+        // ページのサイズ更新
+        pageViewModel.getPageSize().observe(this, new Observer<Integer>() {
+            @Override
+            public void onChanged(Integer pageSize) {
+                binding.textPageSize.setText("/" + pageSize.toString());
+            }
+        });
     }
     //-----------------------------------------------------------------
 }
\ No newline at end of file
diff --git a/app/src/main/java/org/ntlab/acanthus_client/views/paint/page/PageViewModel.java b/app/src/main/java/org/ntlab/acanthus_client/views/paint/page/PageViewModel.java
index 75d4ae7..759af22 100644
--- a/app/src/main/java/org/ntlab/acanthus_client/views/paint/page/PageViewModel.java
+++ b/app/src/main/java/org/ntlab/acanthus_client/views/paint/page/PageViewModel.java
@@ -38,6 +38,10 @@
         return this.mPages;
     }
 
+    public LiveData<Integer> getPageSize() {
+        return this.mPageSize;
+    }
+
     public PaintModelContainer getPaintModelContainer() {
         return paintModelContainer;
     }
@@ -87,9 +91,10 @@
         pageConnectionModel.getPage(mCurPageId);
         updatePrePageId();
     }
+
     //-----------------------------------------------------------------
     // ひとつ前のページを記憶する
-    private void updatePrePageId(){
+    private void updatePrePageId() {
         PageConnectionModel pageConnectionModel = paintModelContainer.getPageConnectionModel();
 //        pageConnectionModel.getPrePageId();
     }
@@ -129,6 +134,7 @@
 
         pageConnectionModel.getPageThumb(mPages);
     }
+
     //-----------------------------------------------------------------
     //
     public void getPageSizeRequest() {
diff --git a/app/src/main/res/layout/activity_page.xml b/app/src/main/res/layout/activity_page.xml
index 380d988..6a09703 100644
--- a/app/src/main/res/layout/activity_page.xml
+++ b/app/src/main/res/layout/activity_page.xml
@@ -39,17 +39,31 @@
             android:layout_height="80dp"
             android:layout_marginLeft="50dp"
             android:layout_marginRight="50dp"
-            android:textSize="50dp"
+            android:textSize="40dp"
             android:textColor="@color/white"
             android:textStyle="bold"
             android:background="#BAF14B16"
             android:drawableBottom="@android:drawable/list_selector_background"
             android:gravity="center|center_horizontal"
-            android:text="pageNo" />
+            android:text="100" />
+        <TextView
+            android:id="@+id/textPageSize"
+            android:layout_width="50dp"
+            android:layout_height="30dp"
+            android:layout_marginTop="25dp"
+            android:layout_marginLeft="-100dp"
+            android:paddingRight="5dp"
+            android:gravity="right|bottom"
+            android:textSize="15dp"
+            android:textColor="@color/white"
+            android:textStyle="bold"
+            android:drawableBottom="@android:drawable/list_selector_background"
+            android:text="/10" />
         <org.ntlab.acanthus_client.views.button.PushButton
             android:id="@+id/buttonNext"
             android:layout_width="50dp"
             android:layout_height="50dp"
+            android:layout_marginLeft="50dp"
             android:background="@drawable/ic_baseline_keyboard_arrow_right"
             android:onClick="onClickToAdvancePage"
             tools:ignore="SpeakableTextPresentCheck" />