diff --git a/app/DeactivatedUser.php b/app/DeactivatedUser.php
new file mode 100644
index 0000000..7cc4b55
--- /dev/null
+++ b/app/DeactivatedUser.php
@@ -0,0 +1,18 @@
+<?php
+
+namespace App;
+
+use Illuminate\Database\Eloquent\Model;
+
+/**
+ * 削除済Userのユーザー名履歴
+ */
+class DeactivatedUser extends Model
+{
+    public $incrementing = false;
+    protected $keyType = 'string';
+
+    protected $fillable = [
+        'name'
+    ];
+}
diff --git a/app/Http/Controllers/Auth/RegisterController.php b/app/Http/Controllers/Auth/RegisterController.php
index 0f6dfcb..9fd7886 100644
--- a/app/Http/Controllers/Auth/RegisterController.php
+++ b/app/Http/Controllers/Auth/RegisterController.php
@@ -48,7 +48,7 @@ class RegisterController extends Controller
     protected function validator(array $data)
     {
         $rules = [
-            'name' => 'required|string|regex:/^[a-zA-Z0-9_-]+$/u|max:15|unique:users',
+            'name' => 'required|string|regex:/^[a-zA-Z0-9_-]+$/u|max:15|unique:users|unique:deactivated_users',
             'email' => 'required|string|email|max:255|unique:users',
             'password' => 'required|string|min:6|confirmed'
         ];
diff --git a/app/Http/Controllers/SettingController.php b/app/Http/Controllers/SettingController.php
index 76c9676..78636a9 100644
--- a/app/Http/Controllers/SettingController.php
+++ b/app/Http/Controllers/SettingController.php
@@ -2,10 +2,14 @@
 
 namespace App\Http\Controllers;
 
+use App\DeactivatedUser;
 use Illuminate\Http\Request;
 use Illuminate\Support\Facades\Auth;
+use Illuminate\Support\Facades\DB;
+use Illuminate\Support\Facades\Hash;
 use Illuminate\Support\Facades\Validator;
 use Illuminate\Validation\Rule;
+use Illuminate\Validation\ValidationException;
 
 class SettingController extends Controller
 {
@@ -67,6 +71,51 @@ class SettingController extends Controller
         return redirect()->route('setting.privacy')->with('status', 'プライバシー設定を更新しました。');
     }
 
+    public function deactivate()
+    {
+        return view('setting.deactivate');
+    }
+
+    public function destroyUser(Request $request)
+    {
+        // パスワードチェック
+        $validated = $request->validate([
+            'password' => 'required|string'
+        ]);
+
+        if (!Hash::check($validated['password'], Auth::user()->getAuthPassword())) {
+            throw ValidationException::withMessages([
+                'password' => 'パスワードが正しくありません。'
+            ]);
+        }
+
+        // データの削除
+        set_time_limit(0);
+        DB::transaction(function () {
+            $user = Auth::user();
+
+            // 関連レコードの削除
+            // TODO: 別にDELETE文相当のクエリを一発発行するだけでもいい？
+            foreach ($user->ejaculations as $ejaculation) {
+                $ejaculation->delete();
+            }
+            foreach ($user->likes as $like) {
+                $like->delete();
+            }
+
+            // 先にログアウトしないとユーザーは消せない
+            Auth::logout();
+
+            // ユーザーの削除
+            $user->delete();
+
+            // ユーザー名履歴に追記
+            DeactivatedUser::create(['name' => $user->name]);
+        });
+
+        return view('setting.deactivated');
+    }
+
     // ( ◠‿◠ )☛ここに気づいたか・・・消えてもらう ▂▅▇█▓▒░(’ω’)░▒▓█▇▅▂うわあああああああ
 //    public function password()
 //    {
diff --git a/app/User.php b/app/User.php
index 1cafaa2..c82e5d0 100644
--- a/app/User.php
+++ b/app/User.php
@@ -53,6 +53,11 @@ class User extends Authenticatable
         return Auth::check() && $this->id === Auth::user()->id;
     }
 
+    public function ejaculations()
+    {
+        return $this->hasMany(Ejaculation::class);
+    }
+
     public function likes()
     {
         return $this->hasMany(Like::class);
diff --git a/database/factories/EjaculationFactory.php b/database/factories/EjaculationFactory.php
new file mode 100644
index 0000000..65fbb6e
--- /dev/null
+++ b/database/factories/EjaculationFactory.php
@@ -0,0 +1,12 @@
+<?php
+/** @var \Illuminate\Database\Eloquent\Factory $factory */
+
+use App\Ejaculation;
+use Faker\Generator as Faker;
+
+$factory->define(Ejaculation::class, function (Faker $faker) {
+    return [
+        'ejaculated_date' => $faker->date('Y-m-d H:i:s'),
+        'note' => $faker->text,
+    ];
+});
diff --git a/database/factories/LikeFactory.php b/database/factories/LikeFactory.php
new file mode 100644
index 0000000..38e82a4
--- /dev/null
+++ b/database/factories/LikeFactory.php
@@ -0,0 +1,10 @@
+<?php
+/** @var \Illuminate\Database\Eloquent\Factory $factory */
+
+use Faker\Generator as Faker;
+
+$factory->define(App\Like::class, function (Faker $faker) {
+    return [
+        //
+    ];
+});
diff --git a/database/factories/ModelFactory.php b/database/factories/ModelFactory.php
deleted file mode 100644
index 7926c79..0000000
--- a/database/factories/ModelFactory.php
+++ /dev/null
@@ -1,24 +0,0 @@
-<?php
-
-/*
-|--------------------------------------------------------------------------
-| Model Factories
-|--------------------------------------------------------------------------
-|
-| Here you may define all of your model factories. Model factories give
-| you a convenient way to create models for testing and seeding your
-| database. Just tell the factory how a default model should look.
-|
-*/
-
-/** @var \Illuminate\Database\Eloquent\Factory $factory */
-$factory->define(App\User::class, function (Faker\Generator $faker) {
-    static $password;
-
-    return [
-        'name' => $faker->name,
-        'email' => $faker->unique()->safeEmail,
-        'password' => $password ?: $password = bcrypt('secret'),
-        'remember_token' => str_random(10),
-    ];
-});
diff --git a/database/factories/UserFactory.php b/database/factories/UserFactory.php
new file mode 100644
index 0000000..fed18ec
--- /dev/null
+++ b/database/factories/UserFactory.php
@@ -0,0 +1,21 @@
+<?php
+/** @var \Illuminate\Database\Eloquent\Factory $factory */
+
+$factory->define(App\User::class, function (Faker\Generator $faker) {
+    static $password;
+
+    return [
+        'name' => substr($faker->userName, 0, 15),
+        'email' => $faker->unique()->safeEmail,
+        'password' => $password ?: $password = bcrypt('secret'),
+        'remember_token' => str_random(10),
+        'display_name' => substr($faker->name, 0, 20),
+        'is_protected' => false,
+        'accept_analytics' => false,
+        'private_likes' => false,
+    ];
+});
+
+$factory->state(App\User::class, 'protected', [
+    'is_protected' => true,
+]);
diff --git a/database/migrations/2019_11_14_003449_create_deactivated_users_table.php b/database/migrations/2019_11_14_003449_create_deactivated_users_table.php
new file mode 100644
index 0000000..3e4f475
--- /dev/null
+++ b/database/migrations/2019_11_14_003449_create_deactivated_users_table.php
@@ -0,0 +1,33 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+class CreateDeactivatedUsersTable extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::create('deactivated_users', function (Blueprint $table) {
+            $table->string('name', 15);
+            $table->timestamps();
+
+            $table->primary('name');
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::dropIfExists('deactivated_users');
+    }
+}
diff --git a/resources/assets/js/setting/deactivate.js b/resources/assets/js/setting/deactivate.js
new file mode 100644
index 0000000..e99acd0
--- /dev/null
+++ b/resources/assets/js/setting/deactivate.js
@@ -0,0 +1,5 @@
+$('#deactivate-form').on('submit', function () {
+    if (!confirm('本当にアカウントを削除してもよろしいですか？')) {
+        return false;
+    }
+});
diff --git a/resources/views/setting/base.blade.php b/resources/views/setting/base.blade.php
index d3274cf..2d53e94 100644
--- a/resources/views/setting/base.blade.php
+++ b/resources/views/setting/base.blade.php
@@ -10,6 +10,8 @@
                        href="{{ route('setting') }}"><span class="oi oi-person mr-1"></span> プロフィール</a>
                     <a class="list-group-item list-group-item-action {{ Route::currentRouteName() === 'setting.privacy' ? 'active' : '' }}"
                        href="{{ route('setting.privacy') }}"><span class="oi oi-shield mr-1"></span> プライバシー</a>
+                    <a class="list-group-item list-group-item-action {{ Route::currentRouteName() === 'setting.deactivate' ? 'active' : '' }}"
+                       href="{{ route('setting.deactivate') }}"><span class="oi oi-trash mr-1"></span> アカウントの削除</a>
                     {{--<a class="list-group-item list-group-item-action {{ Route::currentRouteName() === 'setting.password' ? 'active' : '' }}"
                        href="{{ route('setting.password') }}"><span class="oi oi-key mr-1"></span> パスワード</a>--}}
                 </div>
@@ -19,4 +21,4 @@
             </div>
         </div>
     </div>
-@endsection
\ No newline at end of file
+@endsection
diff --git a/resources/views/setting/deactivate.blade.php b/resources/views/setting/deactivate.blade.php
new file mode 100644
index 0000000..07df952
--- /dev/null
+++ b/resources/views/setting/deactivate.blade.php
@@ -0,0 +1,32 @@
+@extends('setting.base')
+
+@section('title', 'アカウントの削除')
+
+@section('tab-content')
+    <h3>アカウントの削除</h3>
+    <hr>
+    <p>Tissueからあなたのアカウントに関する情報を削除します。</p>
+    <div class="alert alert-danger">
+        <h4 class="alert-heading"><span class="oi oi-warning"></span> 警告</h4>
+        <p><strong>削除はすぐに実行され、取り消すことはできません！</strong></p>
+        <p class="my-0">なりすましを防止するため、あなたのユーザー名はサーバーに記録されます。今後、同じユーザー名を使って再登録することはできません。</p>
+    </div>
+
+    <form id="deactivate-form" action="{{ route('setting.deactivate.destroy') }}" method="post">
+        {{ csrf_field() }}
+        <div class="form-group">
+            <p>上記の条件に同意してアカウントを削除する場合は、パスワードを入力して削除ボタンを押してください。</p>
+            <input name="password" type="password" class="form-control{{ $errors->has('password') ? ' is-invalid' : '' }}" required>
+
+            @if ($errors->has('password'))
+                <div class="invalid-feedback">{{ $errors->first('password') }}</div>
+            @endif
+        </div>
+
+        <button type="submit" class="btn btn-danger mt-2">削除</button>
+    </form>
+@endsection
+
+@push('script')
+    <script src="{{ mix('js/setting/deactivate.js') }}"></script>
+@endpush
diff --git a/resources/views/setting/deactivated.blade.php b/resources/views/setting/deactivated.blade.php
new file mode 100644
index 0000000..1e5fafa
--- /dev/null
+++ b/resources/views/setting/deactivated.blade.php
@@ -0,0 +1,16 @@
+@extends('layouts.base')
+
+@section('title', 'アカウント削除完了')
+
+@section('content')
+    <div class="container">
+        <h3>アカウントを削除しました</h3>
+        <hr>
+        <p>Tissueをご利用いただき、ありがとうございました。</p>
+        <p class="my-5 text-center"><a class="btn btn-link" href="{{ route('home') }}">トップページへ</a></p>
+    </div>
+@endsection
+
+@push('script')
+    <script src="{{ mix('js/setting/deactivate.js') }}"></script>
+@endpush
diff --git a/routes/web.php b/routes/web.php
index 6c0fbdb..184bd18 100644
--- a/routes/web.php
+++ b/routes/web.php
@@ -36,6 +36,8 @@ Route::middleware('auth')->group(function () {
     Route::post('/setting/profile', 'SettingController@updateProfile')->name('setting.profile.update');
     Route::get('/setting/privacy', 'SettingController@privacy')->name('setting.privacy');
     Route::post('/setting/privacy', 'SettingController@updatePrivacy')->name('setting.privacy.update');
+    Route::get('/setting/deactivate', 'SettingController@deactivate')->name('setting.deactivate');
+    Route::post('/setting/deactivate', 'SettingController@destroyUser')->name('setting.deactivate.destroy');
 //    Route::get('/setting/password', 'SettingController@password')->name('setting.password');
 });
 
diff --git a/tests/Feature/SettingTest.php b/tests/Feature/SettingTest.php
new file mode 100644
index 0000000..c54fd84
--- /dev/null
+++ b/tests/Feature/SettingTest.php
@@ -0,0 +1,64 @@
+<?php
+
+namespace Tests\Feature;
+
+use App\Ejaculation;
+use App\Like;
+use App\User;
+use Illuminate\Contracts\Auth\Authenticatable;
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Illuminate\Foundation\Testing\WithFaker;
+use Symfony\Component\DomCrawler\Crawler;
+use Tests\TestCase;
+
+class SettingTest extends TestCase
+{
+    public function testDestroyUser()
+    {
+        $user = factory(User::class)->create();
+        $ejaculation = factory(Ejaculation::class)->create(['user_id' => $user->id]);
+
+        $anotherUser = factory(User::class)->create();
+        $anotherEjaculation = factory(Ejaculation::class)->create(['user_id' => $anotherUser->id]);
+
+        $like = factory(Like::class)->create([
+            'user_id' => $user->id,
+            'ejaculation_id' => $anotherEjaculation->id,
+        ]);
+        $anotherLike = factory(Like::class)->create([
+            'user_id' => $anotherUser->id,
+            'ejaculation_id' => $ejaculation->id,
+        ]);
+
+        $token = $this->getCsrfToken($user, '/setting/deactivate');
+        $response = $this->actingAs($user)
+            ->followingRedirects()
+            ->post('/setting/deactivate', [
+                '_token' => $token,
+                'password' => 'secret',
+            ]);
+
+        $response->assertStatus(200)
+            ->assertViewIs('setting.deactivated');
+        $this->assertGuest();
+        $this->assertDatabaseMissing('users', ['id' => $user->id]);
+        $this->assertDatabaseMissing('ejaculations', ['id' => $ejaculation->id]);
+        $this->assertDatabaseMissing('likes', ['id' => $like->id]);
+        $this->assertDatabaseMissing('likes', ['id' => $anotherLike->id]);
+        $this->assertDatabaseHas('deactivated_users', ['name' => $user->name]);
+    }
+
+    /**
+     * テスト対象を呼び出す前にGETリクエストを行い、CSRFトークンを得る
+     * @param Authenticatable $user 認証情報
+     * @param string $uri リクエスト先
+     * @return string CSRFトークン
+     */
+    private function getCsrfToken(Authenticatable $user, string $uri): string
+    {
+        $response = $this->actingAs($user)->get($uri);
+        $crawler = new Crawler($response->getContent());
+
+        return $crawler->filter('input[name=_token]')->attr('value');
+    }
+}
diff --git a/webpack.mix.js b/webpack.mix.js
index 3532d8b..bf24e44 100644
--- a/webpack.mix.js
+++ b/webpack.mix.js
@@ -16,6 +16,7 @@ mix.js('resources/assets/js/app.js', 'public/js')
     .js('resources/assets/js/home.js', 'public/js')
     .js('resources/assets/js/user/stats.js', 'public/js/user')
     .js('resources/assets/js/setting/privacy.js', 'public/js/setting')
+    .js('resources/assets/js/setting/deactivate.js', 'public/js/setting')
     .ts('resources/assets/js/checkin.ts', 'public/js')
     .sass('resources/assets/sass/app.scss', 'public/css')
     .autoload({