diff --git a/.github/workflows/pr_ci_backend.yaml b/.github/workflows/pr_ci_backend.yaml
index c1be5d72a..3ba53d723 100644
--- a/.github/workflows/pr_ci_backend.yaml
+++ b/.github/workflows/pr_ci_backend.yaml
@@ -34,3 +34,6 @@ jobs:
       - name: Run ruff - Linting and import sorting check
         run: ruff ./backend
         continue-on-error: true
+
+      - name: Run mypy - Static Type Checking
+        run: mypy ./backend --config-file ./backend/pyproject.toml