diff --git a/app/js/post/post.js b/app/js/post/post.js
index e86da973..2fcda3d5 100644
--- a/app/js/post/post.js
+++ b/app/js/post/post.js
@@ -148,10 +148,17 @@ function post(mode, postvis) {
 		}
 	}
 	console.table(toot)
+	if($('#ideKey').val() != ''){
+		var ideKey = $('#ideKey').val()
+	} else {
+		var ideKey = Date.now() + '/' + Math.random().toString(32).substring(2)
+		$('#ideKey').val(ideKey)
+	}
 	var httpreq = new XMLHttpRequest()
 	httpreq.open('POST', start, true)
 	httpreq.setRequestHeader('Content-Type', 'application/json')
 	httpreq.setRequestHeader('Authorization', 'Bearer ' + at)
+	httpreq.setRequestHeader('Idempotency-Key', ideKey)
 	httpreq.responseType = 'json'
 	httpreq.send(JSON.stringify(toot))
 	httpreq.onreadystatechange = function() {
@@ -159,6 +166,8 @@ function post(mode, postvis) {
 			var json = httpreq.response
 			if (this.status !== 200) {
 				setLog(start, this.status, json)
+			} else {
+				$('#ideKey').val('')
 			}
 			var box = localStorage.getItem('box')
 			if (box == 'yes' || !box) {
@@ -255,6 +264,7 @@ function misskeyPost() {
 //クリア(Shift+C)
 function clear() {
 	$('#textarea').val('')
+	$('#ideKey').val('')
 	if (localStorage.getItem('stable')) {
 		$('#textarea').val('#' + localStorage.getItem('stable') + ' ')
 	}
diff --git a/app/js/post/status.js b/app/js/post/status.js
index b3773238..929ba983 100644
--- a/app/js/post/status.js
+++ b/app/js/post/status.js
@@ -454,6 +454,9 @@ function redraft(id, acct_id) {
 						$('#nsfw').html('visibility')
 						$('#nsfw').addClass('nsfw-avail')
 					}
+					if(json.in_reply_to_id){
+						$('#reply').val(json.in_reply_to_id)
+					}
 				}
 			}
 		}
diff --git a/app/view/make/index.sample.html b/app/view/make/index.sample.html
index 54ca70df..ed5db95e 100644
--- a/app/view/make/index.sample.html
+++ b/app/view/make/index.sample.html
@@ -258,6 +258,7 @@
 				</ul>
 				<!--hidden area-->
 				<input type="hidden" id="reply">
+				<input type="hidden" id="ideKey">
 				<input type="hidden" id="quote">
 				<input type="hidden" id="media">
 				<!--END hidden area-->