diff --git a/app/Http/Controllers/TeamsController.php b/app/Http/Controllers/TeamsController.php
index ee853c5b74c..0792c39db0b 100644
--- a/app/Http/Controllers/TeamsController.php
+++ b/app/Http/Controllers/TeamsController.php
@@ -13,6 +13,12 @@
 
 class TeamsController extends Controller
 {
+    public function __construct()
+    {
+        parent::__construct();
+        $this->middleware('auth', ['only' => ['part']]);
+    }
+
     public function edit(string $id): Response
     {
         $team = Team::findOrFail($id);
@@ -21,6 +27,17 @@ public function edit(string $id): Response
         return ext_view('teams.edit', compact('team'));
     }
 
+    public function part(string $id): Response
+    {
+        $team = Team::findOrFail($id);
+        priv_check('TeamPart', $team)->ensureCan();
+
+        $team->members()->findOrFail(\Auth::user()->getKey())->delete();
+        \Session::flash('popup', osu_trans('teams.part.ok'));
+
+        return ujs_redirect(route('teams.show', ['team' => $team]));
+    }
+
     public function show(string $id): Response
     {
         $team = Team
diff --git a/app/Singletons/OsuAuthorize.php b/app/Singletons/OsuAuthorize.php
index 27c14d000e0..de5e189746b 100644
--- a/app/Singletons/OsuAuthorize.php
+++ b/app/Singletons/OsuAuthorize.php
@@ -48,9 +48,10 @@ public static function alwaysCheck($ability)
 
         $set ??= new Ds\Set([
             'ContestJudge',
-            'IsOwnClient',
             'IsNotOAuth',
+            'IsOwnClient',
             'IsSpecialScope',
+            'TeamPart',
             'UserUpdateEmail',
         ]);
 
@@ -1904,6 +1905,22 @@ public function checkScorePin(?User $user, ScoreBest|Solo\Score $score): string
         return 'ok';
     }
 
+    public function checkTeamPart(?User $user, Team $team): ?string
+    {
+        $this->ensureLoggedIn($user);
+
+        $prefix = 'team.part.';
+
+        if ($team->leader_id === $user->getKey()) {
+            return $prefix.'is_leader';
+        }
+        if ($team->getKey() !== $user?->team?->getKey()) {
+            return $prefix.'not_member';
+        }
+
+        return 'ok';
+    }
+
     public function checkTeamUpdate(?User $user, Team $team): ?string
     {
         $this->ensureLoggedIn($user);
diff --git a/resources/css/bem-index.less b/resources/css/bem-index.less
index 20a241d8000..c54c04ab27b 100644
--- a/resources/css/bem-index.less
+++ b/resources/css/bem-index.less
@@ -383,6 +383,7 @@
 @import "bem/supporter-promo";
 @import "bem/supporter-quote";
 @import "bem/supporter-status";
+@import "bem/team-action-button";
 @import "bem/team-info-entries";
 @import "bem/team-info-entry";
 @import "bem/team-members";
diff --git a/resources/css/bem/profile-detail-bar.less b/resources/css/bem/profile-detail-bar.less
index 8524856f16d..49a0cd83b63 100644
--- a/resources/css/bem/profile-detail-bar.less
+++ b/resources/css/bem/profile-detail-bar.less
@@ -19,6 +19,10 @@
     --padding: @gutter-v2-desktop;
   }
 
+  &--team {
+    justify-content: end;
+  }
+
   &__level {
     margin-left: auto;
     display: flex;
diff --git a/resources/css/bem/team-action-button.less b/resources/css/bem/team-action-button.less
new file mode 100644
index 00000000000..bb0712b5cc3
--- /dev/null
+++ b/resources/css/bem/team-action-button.less
@@ -0,0 +1,31 @@
+// Copyright (c) ppy Pty Ltd <contact@ppy.sh>. Licensed under the GNU Affero General Public License v3.0.
+// See the LICENCE file in the repository root for full licence text.
+
+.team-action-button {
+  .reset-input();
+  .link-plain();
+  .link-white();
+  .center-content();
+  .default-text-shadow();
+  display: flex;
+  width: auto;
+  height: 100%;
+  padding: 10px 30px;
+  border-radius: 10000px;
+  text-align: center;
+  font-weight: bold;
+  font-size: @font-size--title-small;
+  background: var(--bg);
+
+  --bg: hsl(var(--hsl-b5));
+  --bg-hover: hsl(var(--hsl-b6));
+
+  &:hover {
+    background: var(--bg-hover);
+  }
+
+  &--part {
+    --bg: hsl(var(--hsl-red-3));
+    --bg-hover: hsl(var(--hsl-red-2));
+  }
+}
diff --git a/resources/lang/en/authorization.php b/resources/lang/en/authorization.php
index 046abae50ea..ba061ef6ccf 100644
--- a/resources/lang/en/authorization.php
+++ b/resources/lang/en/authorization.php
@@ -191,6 +191,13 @@
         ],
     ],
 
+    'team' => [
+        'part' => [
+            'is_leader' => "Team leader can't leave the team.",
+            'not_member' => 'Not a member of the team.',
+        ],
+    ],
+
     'user' => [
         'page' => [
             'edit' => [
diff --git a/resources/lang/en/teams.php b/resources/lang/en/teams.php
index 463c321fd04..ae637b63d52 100644
--- a/resources/lang/en/teams.php
+++ b/resources/lang/en/teams.php
@@ -59,9 +59,14 @@
             ],
         ],
     ],
+
+    'part' => [
+        'ok' => 'Left the team ;_;',
+    ],
+
     'show' => [
         'bar' => [
-            'settings' => 'Settings',
+            'part' => 'Leave Team',
         ],
 
         'info' => [
diff --git a/resources/views/teams/show.blade.php b/resources/views/teams/show.blade.php
index 7e8bd0e786c..ed4c2d6e2ce 100644
--- a/resources/views/teams/show.blade.php
+++ b/resources/views/teams/show.blade.php
@@ -13,6 +13,11 @@
     $teamMembers['member'] ??= [];
     $teamMembers['leader'] ??= $toJson([$team->members()->make(['user_id' => $team->leader_id])->userOrDeleted()]);
     $headerUrl = $team->header()->url();
+
+    $buttons = new Ds\Set();
+    if (priv_check('TeamPart', $team)->can()) {
+        $buttons->add('part');
+    }
 @endphp
 
 @extends('master', [
@@ -69,6 +74,21 @@ class="btn-circle btn-circle--page-toggle"
                 </div>
             </div>
         </div>
+        @if (!$buttons->isEmpty())
+            <div class="profile-detail-bar profile-detail-bar--team">
+                @if ($buttons->contains('part'))
+                    <form
+                        action="{{ route('teams.part', ['team' => $team]) }}"
+                        data-turbo-confirm="{{ osu_trans('common.confirmation') }}"
+                        method="POST"
+                    >
+                        <button class="team-action-button team-action-button--part">
+                            {{ osu_trans('teams.show.bar.part') }}
+                        </button>
+                    </form>
+                @endif
+            </div>
+        @endif
         <div class="user-profile-pages user-profile-pages--no-tabs">
             <div class="page-extra u-fancy-scrollbar">
                 <div class="team-summary">
diff --git a/routes/web.php b/routes/web.php
index a94e8853fa3..bdfac527ab9 100644
--- a/routes/web.php
+++ b/routes/web.php
@@ -296,8 +296,9 @@
     Route::post('user-cover-presets/batch-activate', 'UserCoverPresetsController@batchActivate')->name('user-cover-presets.batch-activate');
     Route::resource('user-cover-presets', 'UserCoverPresetsController', ['only' => ['index', 'store', 'update']]);
 
-    Route::group(['as' => 'teams.', 'prefix' => 'teams/{team}', 'namespace' => 'Teams'], function () {
-        Route::resource('members', 'MembersController', ['only' => ['destroy', 'index']]);
+    Route::group(['as' => 'teams.', 'prefix' => 'teams/{team}'], function () {
+        Route::post('part', 'TeamsController@part')->name('part');
+        Route::resource('members', 'Teams\MembersController', ['only' => ['destroy', 'index']]);
     });
     Route::resource('teams', 'TeamsController', ['only' => ['edit', 'show', 'update']]);