diff --git a/.github/workflows/auto-delete-branch.yml b/.github/workflows/auto-delete-branch.yml
index 43e18c9..cf5dd5b 100644
--- a/.github/workflows/auto-delete-branch.yml
+++ b/.github/workflows/auto-delete-branch.yml
@@ -1,18 +1,18 @@
-name: delete branch
-
-# developに向けて出されたPRだけが対象
-on:
-  pull_request:
-    types: closed # プルリクをクローズしたタイミングだけで動かす
-    branches:
-      - 'develop'
-      - 'feature/**'
-
-jobs:
-  deleteBranch:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/checkout@v2
-      - name: Delete branch
-        run: |
-          git push origin :${{ github.head_ref }}
\ No newline at end of file
+#name: delete branch
+#
+## developに向けて出されたPRだけが対象
+#on:
+#  pull_request:
+#    types: closed # プルリクをクローズしたタイミングだけで動かす
+#    branches:
+#      - 'develop'
+#      - 'feature/**'
+#
+#jobs:
+#  deleteBranch:
+#    runs-on: ubuntu-latest
+#    steps:
+#      - uses: actions/checkout@v2
+#      - name: Delete branch
+#        run: |
+#          git push origin :${{ github.head_ref }}
diff --git a/.github/workflows/label.yml b/.github/workflows/label.yml
new file mode 100644
index 0000000..ff57c2b
--- /dev/null
+++ b/.github/workflows/label.yml
@@ -0,0 +1,21 @@
+name: label
+
+on:
+  pull_request:
+    types: [opened,synchronize] # プルリクを作成したタイミングだけで動かす
+
+jobs:
+  assign:
+    name: label
+    runs-on: ubuntu-latest
+    steps:
+      - name: label
+        uses: b4b4r07/action-github-comment@v1
+        if: github.event.pull_request.labels[0] == null
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        with:
+          body: |
+            Due to the fact that we use release-drafter to automate the creation of release notes, please be sure to label your PRs.
+            See here for how it should be labeled.
+            https://github.com/ttakuya50/github-actions-example/blob/develop/README.md