diff --git a/app/src/main/java/org/ntlab/acanthus_client/resources/gallery/StrokesRest.java b/app/src/main/java/org/ntlab/acanthus_client/resources/gallery/StrokesRest.java
index c33928a..cd1eaf2 100644
--- a/app/src/main/java/org/ntlab/acanthus_client/resources/gallery/StrokesRest.java
+++ b/app/src/main/java/org/ntlab/acanthus_client/resources/gallery/StrokesRest.java
@@ -12,8 +12,11 @@
 import retrofit2.http.Field;
 import retrofit2.http.FormUrlEncoded;
 import retrofit2.http.GET;
+import retrofit2.http.HTTP;
+import retrofit2.http.Headers;
 import retrofit2.http.POST;
 import retrofit2.http.Path;
+import retrofit2.http.Query;
 
 //-----------------------------------------------------------------
 // RestAPI: /gallery/{aid}/pageMap/{pid}/layers/{layerNo}/
@@ -46,7 +49,7 @@
     //-----------------------------------------------------------------
     //
     @DELETE("gallery/{aid}/pageMap/0/layers/0/strokes")
-    Call<String> deleteStrokes(@Path("aid") Integer aid, @Field("uid") Integer uid);
+    Call<String> deleteStrokes(@Path("aid") Integer aid, @Query("uid") Integer uid);
 
     //-----------------------------------------------------------------
     //
diff --git a/app/src/main/java/org/ntlab/acanthus_client/views/paint/PaintCanvas.java b/app/src/main/java/org/ntlab/acanthus_client/views/paint/PaintCanvas.java
index 56ad218..92802e8 100644
--- a/app/src/main/java/org/ntlab/acanthus_client/views/paint/PaintCanvas.java
+++ b/app/src/main/java/org/ntlab/acanthus_client/views/paint/PaintCanvas.java
@@ -70,7 +70,7 @@
         super.onDraw(canvas);
         canvas.drawPath(path, paint);
         canvas.drawPath(path2, paint2);
-        getcanvas();
+        getCanvas();
     }
 
     //-----------------------------------------------------------------
@@ -103,6 +103,7 @@
     //-----------------------------------------------------------------
     // 描画クリア
     public void clearCanvas() {
+        paintViewModel.deleteStrokesRequest();
         path.reset();
         invalidate();
     }
@@ -136,7 +137,7 @@
         invalidate();
     }
     //描写するための取得
-    public void getcanvas(){
+    public void getCanvas(){
         int cnt=0;
             for (Stroke s : paintViewModel.getStroke().getValue()) {
                 for (Position p : s.getPositions()) {
diff --git a/app/src/main/java/org/ntlab/acanthus_client/views/paint/PaintConnectionModel.java b/app/src/main/java/org/ntlab/acanthus_client/views/paint/PaintConnectionModel.java
index c4bd203..ac86d13 100644
--- a/app/src/main/java/org/ntlab/acanthus_client/views/paint/PaintConnectionModel.java
+++ b/app/src/main/java/org/ntlab/acanthus_client/views/paint/PaintConnectionModel.java
@@ -1,5 +1,7 @@
 package org.ntlab.acanthus_client.views.paint;
 
+import android.util.Log;
+
 import androidx.lifecycle.MutableLiveData;
 import androidx.navigation.ActivityNavigator;
 
@@ -106,14 +108,15 @@
             }
         });
     }
+
     //-----------------------------------------------------------------
     //Getを追加
-    public void apigetPosition(MutableLiveData<Collection<Position>> paintPosition,int num){
+    public void apiGetPosition(MutableLiveData<Collection<Position>> paintPosition, int num) {
         final StrokesRest strokesRest = retrofit.create(StrokesRest.class);
 
         //-----------------------------------------------------------------
         // 筆跡追加API
-        Call<Collection<Position>> call = strokesRest.getPositions(acanthus.getAid(),num);
+        Call<Collection<Position>> call = strokesRest.getPositions(acanthus.getAid(), num);
         call.enqueue(new Callback<Collection<Position>>() {
             @Override
             public void onResponse(Call<Collection<Position>> call, Response<Collection<Position>> response) {
@@ -130,7 +133,7 @@
 
     //-----------------------------------------------------------------
     //Getを追加
-    public void getStrokesize(MutableLiveData<Collection<Stroke>> strokes){
+    public void getStrokeSize(MutableLiveData<Collection<Stroke>> strokes) {
         final StrokesRest strokesRest = retrofit.create(StrokesRest.class);
 
         //-----------------------------------------------------------------
@@ -150,6 +153,24 @@
 
     }
 
+    //-----------------------------------------------------------------
+    //DELETE
+    public void deleteStrokes() {
+        final StrokesRest strokesRest = retrofit.create(StrokesRest.class);
 
+        //-----------------------------------------------------------------
+        // 筆跡をすべて削除する
+        Call<String> call = strokesRest.deleteStrokes(acanthus.getAid(), acanthus.getPreferenceUid());
+        call.enqueue(new Callback<String>() {
+            @Override
+            public void onResponse(Call<String> call, Response<String> response) {
+            }
+
+            @Override
+            public void onFailure(Call<String> call, Throwable t) {
+            }
+        });
+    }
+    //-----------------------------------------------------------------
 
 }
\ No newline at end of file
diff --git a/app/src/main/java/org/ntlab/acanthus_client/views/paint/PaintViewModel.java b/app/src/main/java/org/ntlab/acanthus_client/views/paint/PaintViewModel.java
index e6d1f34..896ea6d 100644
--- a/app/src/main/java/org/ntlab/acanthus_client/views/paint/PaintViewModel.java
+++ b/app/src/main/java/org/ntlab/acanthus_client/views/paint/PaintViewModel.java
@@ -23,10 +23,16 @@
 
     private PaintModelContainer paintModelContainer;
     private MutableLiveData<Collection<Position>> paintPosition;
-    private MutableLiveData<Collection<Stroke>> strokes;
+    private MutableLiveData<Collection<Stroke>> mStrokes;
     private ScheduledThreadPoolExecutor thread = new ScheduledThreadPoolExecutor(1);
 
     //-----------------------------------------------------------------
+    // getter
+    public MutableLiveData<Collection<Stroke>> getStroke(){
+        return this.mStrokes;
+    }
+
+    //-----------------------------------------------------------------
     //-----------------------------------------------------------------
     //  init
     public void init(Acanthus acanthus) {
@@ -34,9 +40,9 @@
         paintModelContainer.getPaintConnectionModel().init(acanthus);
         paintModelContainer.getInvitesConnectionModel().init(acanthus);
         paintPosition = new MutableLiveData<>();
-        strokes = new MutableLiveData<>();
-        strokes.setValue(new ArrayList<>());
-        strokes.getValue().add(new Stroke());
+        mStrokes = new MutableLiveData<>();
+        mStrokes.setValue(new ArrayList<>());
+        mStrokes.getValue().add(new Stroke());
         thread.scheduleWithFixedDelay(this, 1000L, 100L, TimeUnit.MICROSECONDS);
     }
 
@@ -64,20 +70,22 @@
     }
 
     //-----------------------------------------------------------------
+    // 描画情報の全クリア
+    public void deleteStrokesRequest(){
+        paintModelContainer.getPaintConnectionModel().deleteStrokes();
+    }
+
+    //-----------------------------------------------------------------
     // 一定間隔でサーバー上の筆跡を取得する（GET）
     @Override
     public void run() {
         Log.d("debug", "run: ");
-        paintModelContainer.getPaintConnectionModel().getStrokesize(strokes);
-        //paintModelContainer.getPaintConnectionModel().apigetPosition(paintPosition,i);
+        paintModelContainer.getPaintConnectionModel().getStrokeSize(mStrokes);
+        //paintModelContainer.getPaintConnectionModel().apiGetPosition(paintPosition,i);
     }
 
     //-----------------------------------------------------------------
-
-    public MutableLiveData<Collection<Stroke>> getStroke(){
-        return strokes;
-    }
-
+    //
     public void stop(){
         thread.shutdown();
     }