diff --git a/checkout-repository/action.yml b/checkout-repository/action.yml
new file mode 100644
index 0000000..34571a7
--- /dev/null
+++ b/checkout-repository/action.yml
@@ -0,0 +1,73 @@
+name: 특정 저장소 체크아웃
+description: Git 인증 정보를 사용해 특정 저장소와 브랜치를 수동으로 체크아웃
+
+inputs:
+  repository-url:
+    required: true
+    description: 체크아웃할 Git 저장소 URL
+  username:
+    required: true
+    description: Git 인증 사용자명
+  access-token:
+    required: true
+    description: Git 인증 토큰
+  branch:
+    required: false
+    default: develop
+    description: 체크아웃할 브랜치
+  path:
+    required: false
+    default: "."
+    description: 저장소를 체크아웃할 경로
+
+runs:
+  using: composite
+  steps:
+    - name: 특정 저장소 체크아웃
+      shell: bash
+      env:
+        GIT_REPOSITORY_URL: ${{ inputs.repository-url }}
+        GIT_USERNAME: ${{ inputs.username }}
+        GIT_ACCESS_TOKEN: ${{ inputs.access-token }}
+        GIT_BRANCH: ${{ inputs.branch }}
+        CHECKOUT_PATH: ${{ inputs.path }}
+      run: |
+        set -euo pipefail
+
+        SUDO=""
+        [ "$(id -u)" -ne 0 ] && SUDO="sudo"
+
+        if ! command -v git >/dev/null 2>&1; then
+          if command -v apt-get >/dev/null 2>&1; then
+            $SUDO apt-get update
+            $SUDO apt-get install -y --no-install-recommends git ca-certificates
+          else
+            echo "git이 없습니다. git을 설치한 러너가 필요합니다."
+            exit 1
+          fi
+        fi
+
+        ASKPASS_FILE="$(mktemp)"
+        cleanup() {
+          rm -f "$ASKPASS_FILE"
+        }
+        trap cleanup EXIT
+
+        cat > "$ASKPASS_FILE" <<'EOF'
+        #!/bin/sh
+        case "$1" in
+          *Username*) echo "$GIT_USERNAME" ;;
+          *Password*) echo "$GIT_ACCESS_TOKEN" ;;
+        esac
+        EOF
+        chmod 700 "$ASKPASS_FILE"
+
+        export GIT_ASKPASS="$ASKPASS_FILE"
+        export GIT_TERMINAL_PROMPT=0
+
+        mkdir -p "$CHECKOUT_PATH"
+        git clone \
+          --branch "$GIT_BRANCH" \
+          --single-branch \
+          "$GIT_REPOSITORY_URL" \
+          "$CHECKOUT_PATH"