diff --git a/src/domain/github.ts b/src/domain/github.ts
index 1d028b6..c94e083 100644
--- a/src/domain/github.ts
+++ b/src/domain/github.ts
@@ -33,6 +33,14 @@ const buildError = (payload: unknown): Error => {
   return new Error(`unknown event hook: ${JSON.stringify(payload)}`);
 };
 
+export const needToReviewRequest = (payload: WebhookPayload): boolean => {
+  if (payload.pull_request?.draft === true) {
+    return false;
+  }
+
+  return true;
+};
+
 export const needToSendApproveMention = (payload: WebhookPayload): boolean => {
   if (payload.review?.state === "approved") {
     return true;
diff --git a/src/main.ts b/src/main.ts
index 6798c3d..9304e0d 100644
--- a/src/main.ts
+++ b/src/main.ts
@@ -10,7 +10,11 @@ import {
   postError,
 } from "./usecase";
 import { getAllInputs } from "./model";
-import { needToMention, needToSendApproveMention } from "./domain/github";
+import {
+  needToMention,
+  needToReviewRequest,
+  needToSendApproveMention,
+} from "./domain/github";
 
 export const main = async (): Promise<void> => {
   core.info("start main");
@@ -27,7 +31,7 @@ export const main = async (): Promise<void> => {
     const mapping = await execLoadMapping(configurationPath, repoToken);
     core.info(JSON.stringify(mapping));
 
-    if (reviewRequest) {
+    if (reviewRequest && needToReviewRequest(payload)) {
       await execPrReviewRequestedMention(payload, allInputs, mapping);
       core.info("finish execPrReviewRequestedMention()");
     } else if (needToSendApproveMention(payload)) {