diff --git a/.github/workflows/project.yml b/.github/workflows/project.yml
new file mode 100644
index 0000000000..38e99a4020
--- /dev/null
+++ b/.github/workflows/project.yml
@@ -0,0 +1,25 @@
+name: project
+
+on:
+  issues:
+    types:
+      - opened
+      - transferred
+  pull_request:
+    types:
+      - opened
+
+jobs:
+  add-to-project:
+    name: Add Issue or PR to project
+    runs-on: ubuntu-latest
+    steps:
+      - uses: cybozu/octoken-action@v1
+        id: create-iat
+        with:
+          github_app_id: ${{ secrets.PROJECT_GITHUB_APP_ID}}
+          github_app_private_key: ${{ secrets.PROJECT_GITHUB_APP_KEY }}
+      - uses: actions/add-to-project@v0.4.0
+        with:
+          project-url: ${{ secrets.PROJECT_URL }}
+          github-token: ${{ steps.create-iat.outputs.token }}