diff --git a/app/Http/Controllers/EjaculationController.php b/app/Http/Controllers/EjaculationController.php
index 4490677..d2292e0 100644
--- a/app/Http/Controllers/EjaculationController.php
+++ b/app/Http/Controllers/EjaculationController.php
@@ -30,9 +30,6 @@ class EjaculationController extends Controller
     public function store(Request $request)
     {
         $inputs = $request->all();
-        if ($request->has('note')) {
-            $inputs['note'] = str_replace(["\r\n", "\r"], "\n", $inputs['note']);
-        }
 
         $validator = Validator::make($inputs, [
             'date' => 'required|date_format:Y/m/d',
@@ -113,9 +110,6 @@ class EjaculationController extends Controller
         $ejaculation = Ejaculation::findOrFail($id);
 
         $inputs = $request->all();
-        if ($request->has('note')) {
-            $inputs['note'] = str_replace(["\r\n", "\r"], "\n", $inputs['note']);
-        }
 
         $validator = Validator::make($inputs, [
             'date' => 'required|date_format:Y/m/d',
diff --git a/app/Http/Kernel.php b/app/Http/Kernel.php
index 93bf68b..95714cf 100644
--- a/app/Http/Kernel.php
+++ b/app/Http/Kernel.php
@@ -35,6 +35,7 @@ class Kernel extends HttpKernel
             \Illuminate\View\Middleware\ShareErrorsFromSession::class,
             \App\Http\Middleware\VerifyCsrfToken::class,
             \Illuminate\Routing\Middleware\SubstituteBindings::class,
+            \App\Http\Middleware\NormalizeLineEnding::class,
         ],
 
         'api' => [
diff --git a/app/Http/Middleware/NormalizeLineEnding.php b/app/Http/Middleware/NormalizeLineEnding.php
new file mode 100644
index 0000000..e0ec87e
--- /dev/null
+++ b/app/Http/Middleware/NormalizeLineEnding.php
@@ -0,0 +1,30 @@
+<?php
+
+namespace App\Http\Middleware;
+
+use Closure;
+
+/**
+ * リクエスト内の改行コードを正規化する。
+ * @package App\Http\Middleware
+ */
+class NormalizeLineEnding
+{
+    /**
+     * Handle an incoming request.
+     *
+     * @param  \Illuminate\Http\Request  $request
+     * @param  \Closure  $next
+     * @return mixed
+     */
+    public function handle($request, Closure $next)
+    {
+        $newInput = [];
+        foreach ($request->input() as $key => $value) {
+            $newInput[$key] = str_replace(["\r\n", "\r"], "\n", $value);
+        }
+        $request->replace($newInput);
+
+        return $next($request);
+    }
+}
diff --git a/tests/Unit/Http/Middleware/NormalizeLineEndingTest.php b/tests/Unit/Http/Middleware/NormalizeLineEndingTest.php
new file mode 100644
index 0000000..7d16f0b
--- /dev/null
+++ b/tests/Unit/Http/Middleware/NormalizeLineEndingTest.php
@@ -0,0 +1,80 @@
+<?php
+
+namespace Tests\Unit\Http\Middleware;
+
+use App\Http\Middleware\NormalizeLineEnding;
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Illuminate\Foundation\Testing\WithFaker;
+use Illuminate\Http\Request;
+use Tests\TestCase;
+
+class NormalizeLineEndingTest extends TestCase
+{
+    public function testCRLFtoLF()
+    {
+        $request = Request::create('/');
+        $request->replace([
+            'test' => "foo\r\nbar"
+        ]);
+
+        $middleware = new NormalizeLineEnding();
+
+        $middleware->handle($request, function (Request $request) {
+            $this->assertEquals("foo\nbar", $request->input('test'));
+        });
+    }
+
+    public function testCRtoLF()
+    {
+        $request = Request::create('/');
+        $request->replace([
+            'test' => "foo\rbar"
+        ]);
+
+        $middleware = new NormalizeLineEnding();
+
+        $middleware->handle($request, function (Request $request) {
+            $this->assertEquals("foo\nbar", $request->input('test'));
+        });
+    }
+
+    public function testLFtoLF()
+    {
+        $request = Request::create('/');
+        $request->replace([
+            'test' => "foo\nbar"
+        ]);
+
+        $middleware = new NormalizeLineEnding();
+
+        $middleware->handle($request, function (Request $request) {
+            $this->assertEquals("foo\nbar", $request->input('test'));
+        });
+    }
+
+    public function testArrayRequest()
+    {
+        $request = Request::create('/');
+        $request->replace([
+            'test' => "foo\r\nbar",
+            'hash' => [
+                'yuzuki' => "yuzuki\r\nyukari",
+                'miku' => "hatsune\r\nmiku",
+            ],
+            'array' => [
+                "kagamine\r\nrin",
+                "kagamine\r\nlen"
+            ]
+        ]);
+
+        $middleware = new NormalizeLineEnding();
+
+        $middleware->handle($request, function (Request $request) {
+            $this->assertEquals("foo\nbar", $request->input('test'));
+            $this->assertEquals("yuzuki\nyukari", $request->input('hash.yuzuki'));
+            $this->assertEquals("hatsune\nmiku", $request->input('hash.miku'));
+            $this->assertEquals("kagamine\nrin", $request->input('array.0'));
+            $this->assertEquals("kagamine\nlen", $request->input('array.1'));
+        });
+    }
+}