diff --git a/.github/workflows/deploy_to_gcp.yml b/.github/workflows/deploy_to_gcp.yml
index 0920e60..c955af1 100644
--- a/.github/workflows/deploy_to_gcp.yml
+++ b/.github/workflows/deploy_to_gcp.yml
@@ -56,4 +56,13 @@ jobs:
           export GOOGLE_APPLICATION_CREDENTIALS="$HOME/sa.json"
           ./scripts/deploy/plan_terraform.sh
 
+      - name: Exec Terraform apply shell
+        run: |
+          export GOOGLE_APPLICATION_CREDENTIALS="$HOME/sa.json"
+          ./scripts/deploy/apply_terraform.sh
+      
+      - name: Clean up Gcloud auth file
+        run: |
+          rm -f $HOME/sa.json 
+          echo "Cleaned up Gcloud auth file."
 
diff --git a/scripts/deploy/applay_terraform.sh b/scripts/deploy/applay_terraform.sh
new file mode 100755
index 0000000..5334ae0
--- /dev/null
+++ b/scripts/deploy/applay_terraform.sh
@@ -0,0 +1,26 @@
+#!/bin/bash
+
+# Safe mode(when error,kill script)
+set -euo pipefail
+
+# 変数の設定({HOME}/hash.txt からハッシュ値を取得)
+TF_DIR=${TF_DIR:-terraform}
+ENV=${ENV:-dev}
+
+cd "$TF_DIR"
+
+# --- デプロイ条件 ---
+if [[ "${BRANCH_NAME:-}" =~ ^.*deploy$ ]]; then
+    echo "Start terraform apply (ENV=${ENV}, DIR=${TF_DIR}) ..."
+else
+    echo "Skip terraform apply (branch=${BRANCH_NAME:-})"
+    exit 0
+fi
+
+# --- plan 結果があるか確認 ---
+if [[ ! -f tfplan ]]; then
+    echo "ERROR: tfplan not found in $(pwd). Run plan step first." >&2
+    exit 1
+fi
+
+terraform apply -auto-approve tfplan