diff --git a/.changeset/changeset-1.md b/.changeset/changeset-1.md
new file mode 100644
index 0000000..43a2eb4
--- /dev/null
+++ b/.changeset/changeset-1.md
@@ -0,0 +1,7 @@
+---
+"@naverpay/commithelper-go": patch
+---
+
+Modify Config struct to include Protect field and add branch protection check
+
+PR: [Modify Config struct to include Protect field and add branch protection check](https://github.com/NaverPayDev/cli/pull/44)
\ No newline at end of file
diff --git a/packages/commithelper-go/main.go b/packages/commithelper-go/main.go
index 1afd010..bb6df9c 100644
--- a/packages/commithelper-go/main.go
+++ b/packages/commithelper-go/main.go
@@ -11,7 +11,8 @@ import (
 )
 
 type Config struct {
-	Rules map[string]*string `json:"rules"`
+	Rules   map[string]*string `json:"rules"`
+	Protect []string           `json:"protect"`
 }
 
 func main() {
@@ -56,6 +57,12 @@ func main() {
 	branchName := getCurrentBranchName()
 	config := loadConfig()
 
+	// Check if current branch is protected
+	if isProtectedBranch(branchName, config.Protect) {
+		fmt.Printf("Error: Cannot commit to protected branch '%s'\n", branchName)
+		os.Exit(1)
+	}
+
 	prefix := generatePrefix(branchName, config)
 	if prefix != "" {
 		commitMessage = fmt.Sprintf("[%s] %s", prefix, commitMessage)
@@ -96,7 +103,7 @@ func loadConfig() Config {
 	if err != nil {
 		if os.IsNotExist(err) {
 			// Return an empty config if the file does not exist
-			return Config{Rules: map[string]*string{}}
+			return Config{Rules: map[string]*string{}, Protect: []string{}}
 		}
 		fmt.Printf("Error reading config file at %s: %v\n", configPath, err)
 		os.Exit(1)
@@ -140,6 +147,15 @@ func generatePrefix(branchName string, config Config) string {
 	return fmt.Sprintf("%s#%s", *repo, issueNumber)
 }
 
+func isProtectedBranch(branchName string, protectedBranches []string) bool {
+	for _, protected := range protectedBranches {
+		if branchName == protected {
+			return true
+		}
+	}
+	return false
+}
+
 func isAlreadyTagged(commitMessage string) bool {
 	// Check if commit message already contains issue tag like [#123] or [org/repo#123]
 	// This pattern matches: