diff --git a/packages/hydrooj/src/handler/contest.ts b/packages/hydrooj/src/handler/contest.ts
index d56f0329..6d633b95 100644
--- a/packages/hydrooj/src/handler/contest.ts
+++ b/packages/hydrooj/src/handler/contest.ts
@@ -282,12 +282,14 @@ export class ContestScoreboardHandler extends ContestDetailBaseHandler {
             config.lockAt = this.tdoc.lockAt;
         }
         const [, rows, udict, pdict] = await contest.getScoreboard.call(this, domainId, tid, config);
+        const groups = this.user.hasPerm(PERM.PERM_EDIT_DOMAIN)
+            ? await user.listGroup(domainId) : [];
         // eslint-disable-next-line @typescript-eslint/naming-convention
         const page_name = this.tdoc.rule === 'homework'
             ? 'homework_scoreboard'
             : 'contest_scoreboard';
         this.response.body = {
-            tdoc: this.tdoc, rows, udict, pdict, page_name,
+            tdoc: this.tdoc, rows, udict, pdict, page_name, groups,
         };
         this.response.pjax = 'partials/scoreboard.html';
         this.response.template = 'contest_scoreboard.html';
diff --git a/packages/ui-default/pages/contest_scoreboard.page.ts b/packages/ui-default/pages/contest_scoreboard.page.ts
index ebdc4a6e..161658fe 100644
--- a/packages/ui-default/pages/contest_scoreboard.page.ts
+++ b/packages/ui-default/pages/contest_scoreboard.page.ts
@@ -30,9 +30,14 @@ const page = new NamedPage('contest_scoreboard', () => {
     } else if (val === 'star') {
       $('.data-table tbody tr').hide();
       read().forEach((uid) => $(`.star.user--${uid}`).closest('tr').show());
-    } else {
+    } else if (val === 'rank') {
       $('.data-table tbody tr').show();
       $('.rank--unrank').closest('tr').hide();
+    } else {
+      $('.data-table tbody tr').hide();
+      const uids = val.toString().split(',').map((i) => +i.trim()).filter((i) => i);
+      if (!uids?.length) return;
+      uids.forEach((uid) => $(`.user--${uid}`).closest('tr').show());
     }
   });
 
@@ -40,7 +45,7 @@ const page = new NamedPage('contest_scoreboard', () => {
   const endAt = new Date(UiContext.tdoc.endAt).getTime();
   function updateScoreboard() {
     const now = Date.now();
-    if (beginAt <= now && now <= endAt) pjax.request(UiContext.scoreboardUrl || '', { push: false });
+    if (beginAt <= now && now <= endAt) pjax.request({ url: UiContext.scoreboardUrl || '', push: false });
   }
 
   setInterval(updateScoreboard, 180000);
diff --git a/packages/ui-default/templates/contest_scoreboard.html b/packages/ui-default/templates/contest_scoreboard.html
index 0cc04656..0c0a560e 100644
--- a/packages/ui-default/templates/contest_scoreboard.html
+++ b/packages/ui-default/templates/contest_scoreboard.html
@@ -25,6 +25,9 @@
           <option value="all">{{ _('All Users') }}</option>
           <option value="star">{{ _('Starred Users') }}</option>
           <option value="rank">{{ _('Ranked Users') }}</option>
+          {% for group in groups %}
+            <option value="{{ group.uids.join(',') }}">{{ group.name }}</option>
+          {% endfor %}
         </select>
       </div>
     </div>