diff --git a/app/js/login/login.js b/app/js/login/login.js
index 77b344c3..12d8f781 100644
--- a/app/js/login/login.js
+++ b/app/js/login/login.js
@@ -40,7 +40,7 @@ function ck() {
 		if (obj[0].domain) {
 			$("#tl").show();
 			ticker();
-			multiSelector();
+			multiSelector(false);
 			verck(ver);
 			$("#something-wrong img").attr("src", "../../img/thinkingdesk.png")
 		}
@@ -403,7 +403,7 @@ function ckdb(acct_id) {
 }
 
 //アカウントを選択…を実装
-function multiSelector() {
+function multiSelector(parseC) {
 	var multi = localStorage.getItem("multi");
 	if (!multi) {
 		var obj = [];
@@ -490,7 +490,9 @@ function multiSelector() {
 		$("#add-acct-sel").append('<option value="noauth">' + lang.lang_login_noauth + '</option><option value="webview">Twitter</option>');
 	}
 	$('select').formSelect();
-	parseColumn(true);
+	if(!parseC){
+		parseColumn(true);
+	}
 }
 
 //バージョンエンコ
diff --git a/app/js/userdata/showOnTL.js b/app/js/userdata/showOnTL.js
index 64777b6b..b83feb2f 100644
--- a/app/js/userdata/showOnTL.js
+++ b/app/js/userdata/showOnTL.js
@@ -193,6 +193,9 @@ function udg(user, acct_id) {
 			$("#his-emp-btn").hide();
 			$(".only-my-data").show();
 			$(".only-his-data").hide();
+			if(localStorage.getItem("main")==acct_id){
+				$("#his-main-acct").hide();
+			}
 		} else {
 			relations(user, acct_id);
 			$(".only-my-data").hide();
@@ -293,6 +296,9 @@ function misskeyUdg(user, acct_id) {
 			$("#his-emp-btn").hide();
 			$(".only-my-data").show();
 			$(".only-his-data").hide();
+			if(localStorage.getItem("main")==acct_id){
+				$("#his-main-acct").hide();
+			}
 		} else {
 			if (json.isFollowing) {
 				//自分がフォローしている
@@ -409,6 +415,12 @@ function profbrws() {
 	var url = $("#his-openin").attr("data-href")
 	postMessage(["openUrl", url], "*")
 }
+function setMain() {
+	var acct_id = $("#his-data").attr("use-acct")
+	localStorage.setItem("main", acct_id);
+	multiSelector(true)
+	M.toast({ html: lang.lang_manager_mainAcct, displayLength: 3000 })
+}
 //オールリセット
 function hisclose() {
 	$('#his-data').modal('close');
@@ -464,6 +476,7 @@ function reset() {
 	$("#his-openin").attr("data-href", "");
 	$("#his-float-timeline").show();
 	$("#his-float-blocked").hide();
+	$("#his-main-acct").show();
 	$("#his-proof-prof").html("")
 }
 $('#my-data-nav .tab').on('click', function () {
diff --git a/app/view/en/index.html b/app/view/en/index.html
index f654269e..270eeb42 100644
--- a/app/view/en/index.html
+++ b/app/view/en/index.html
@@ -465,7 +465,9 @@
 						<a href="#!" class="btn waves-effect waves-effect blue-grey btn-flat only-his-data"
 							id="his-end-btn" onclick="pinUser()">Feature on profile</a><br>
 						<a href="#!" class="btn waves-effect waves-effect blue-grey btn-flat" id="his-openin"
-							onclick="profbrws()">Open in browser</a><br>
+							onclick="profbrws()">Open in browser</a>
+						<a href="#!" class="btn waves-effect waves-effect blue-grey btn-flat only-my-data" id="his-main-acct"
+							onclick="setMain()" style="width: calc(100% - 10px)">Set it an main account</a><br>
 					</div><br>
 					<div id="his-matching-list">
 						Get people resembling this user.<br>
diff --git a/app/view/ja/index.html b/app/view/ja/index.html
index 15e21438..ec4c64b3 100644
--- a/app/view/ja/index.html
+++ b/app/view/ja/index.html
@@ -465,7 +465,9 @@
 						<a href="#!" class="btn waves-effect waves-effect blue-grey btn-flat only-his-data"
 							id="his-end-btn" onclick="pinUser()">紹介する</a><br>
 						<a href="#!" class="btn waves-effect waves-effect blue-grey btn-flat" id="his-openin"
-							onclick="profbrws()">ブラウザで開く</a><br>
+							onclick="profbrws()">ブラウザで開く</a>
+						<a href="#!" class="btn waves-effect waves-effect blue-grey btn-flat only-my-data" id="his-main-acct"
+							onclick="setMain()" style="width: calc(100% - 10px)">メインアカウントに設定</a><br>
 					</div><br>
 					<div id="his-matching-list">
 						似ているユーザーを取得できます。<br>
diff --git a/app/view/make/index.sample.html b/app/view/make/index.sample.html
index 85ab5acc..8bc98699 100644
--- a/app/view/make/index.sample.html
+++ b/app/view/make/index.sample.html
@@ -465,7 +465,9 @@
 						<a href="#!" class="btn waves-effect waves-effect blue-grey btn-flat only-his-data"
 							id="his-end-btn" onclick="pinUser()">@@endorse@@</a><br>
 						<a href="#!" class="btn waves-effect waves-effect blue-grey btn-flat" id="his-openin"
-							onclick="profbrws()">@@openinbrowser@@</a><br>
+							onclick="profbrws()">@@openinbrowser@@</a>
+						<a href="#!" class="btn waves-effect waves-effect blue-grey btn-flat only-my-data" id="his-main-acct"
+							onclick="setMain()" style="width: calc(100% - 10px)">@@mainacct@@</a><br>
 					</div><br>
 					<div id="his-matching-list">
 						@@likeUserDes@@<br>
diff --git a/app/view/make/language/index.en.json b/app/view/make/language/index.en.json
index cab2da6c..ae6f75fd 100644
--- a/app/view/make/language/index.en.json
+++ b/app/view/make/language/index.en.json
@@ -88,6 +88,7 @@
     "likeHimOrHer":"Resembling",
     "endorse":"Feature on profile",
     "openinbrowser":"Open in browser",
+    "mainacct":"Set it an main account",
     "frc":"Suggest",
     "more":"More",
     "revoverJP":" to ",
diff --git a/app/view/make/language/index.ja.json b/app/view/make/language/index.ja.json
index efe81438..a81aa85d 100644
--- a/app/view/make/language/index.ja.json
+++ b/app/view/make/language/index.ja.json
@@ -89,6 +89,7 @@
     "more":"もっと",
     "endorse":"紹介する",
     "openinbrowser":"ブラウザで開く",
+    "mainacct":"メインアカウントに設定",
     "revoverJP":"する",
     "warnUseOtherAcct":"(解除はできません。)",
     "revoverJPde":"で",
diff --git a/app/view/ps/index.html b/app/view/ps/index.html
index dfe3c8bd..e46bca2f 100644
--- a/app/view/ps/index.html
+++ b/app/view/ps/index.html
@@ -465,7 +465,9 @@
 						<a href="#!" class="btn waves-effect waves-effect blue-grey btn-flat only-his-data"
 							id="his-end-btn" onclick="pinUser()">crwdns454:0crwdne454:0</a><br>
 						<a href="#!" class="btn waves-effect waves-effect blue-grey btn-flat" id="his-openin"
-							onclick="profbrws()">crwdns455:0crwdne455:0</a><br>
+							onclick="profbrws()">crwdns455:0crwdne455:0</a>
+						<a href="#!" class="btn waves-effect waves-effect blue-grey btn-flat only-my-data" id="his-main-acct"
+							onclick="setMain()" style="width: calc(100% - 10px)">@@mainacct@@</a><br>
 					</div><br>
 					<div id="his-matching-list">
 						crwdns469:0crwdne469:0<br>