diff --git a/app/Reservation.php b/app/Reservation.php
index 246e381..ac852e5 100644
--- a/app/Reservation.php
+++ b/app/Reservation.php
@@ -2,6 +2,7 @@
 
 namespace App;
 
+use Carbon\Carbon;
 use Illuminate\Database\Eloquent\Model;
 
 /**
@@ -22,12 +23,18 @@ class Reservation extends Model
         'user_id', 'reserve_time',
     ];
 
+    // 7時〜11時台は20分単位の予約
+    const SHORT_RESERVATION_TIME_START_HOUR = 7;
+    const SHORT_RESERVATION_TIME_END_HOUR = 11;
+    // 予約する時間枠の長さ
+    const DEFAULT_RESERVATION_TIME_SPAN = 30;
+    const SHORT_RESERVATION_TIME_SPAN = 20;
+
     /**
      * @return \Illuminate\Database\Eloquent\Relations\BelongsTo
      */
     public function user()
     {
-      return $this->belongsTo('App\User', 'user_id', 'id');
+        return $this->belongsTo('App\User', 'user_id', 'id');
     }
-
 }
diff --git a/app/Services/ReserveTimeOptionService.php b/app/Services/ReserveTimeOptionService.php
new file mode 100644
index 0000000..e69e31b
--- /dev/null
+++ b/app/Services/ReserveTimeOptionService.php
@@ -0,0 +1,53 @@
+<?php
+
+namespace App\Services;
+
+use App\Reservation;
+use Carbon\Carbon;
+
+/**
+ * 予約時刻作成Service
+ *
+ * Class ReserveTimeOptionService
+ * @package App\Services
+ */
+class ReserveTimeOptionService
+{
+    public function makeTimeOptions(Carbon $time)
+    {
+        $timeOptions = [];
+        $targetTime = $time;
+
+        // 24時間後までの予約時間の選択肢を作成する
+        for ($index = 0; $index < 24; $index++) {
+            if ($index !== 0) {
+                $targetTime = $time->copy()->addHour($index)->setMinute(0);
+            }
+            $timeOptions = array_merge($timeOptions, $this->makeTimeOptionsForTargetHour($targetTime));
+        }
+
+        return $timeOptions;
+    }
+
+    public function makeTimeOptionsForTargetHour(Carbon $targetTime)
+    {
+        $timeOptions = [];
+
+        if ($targetTime->hour >= Reservation::SHORT_RESERVATION_TIME_START_HOUR ||
+            $targetTime->hour <= Reservation::SHORT_RESERVATION_TIME_END_HOUR) {
+            // 作成しようとした予約開始時刻が朝の時間帯の範囲の場合は、20分単位で選択肢を作成
+            $startMinutes = [0, 20, 40];
+        } else {
+            $startMinutes = [0, 30];
+        }
+
+        foreach ($startMinutes as $startMinute) {
+            if ($targetTime->minute <= $startMinute) {
+                $timeOptions[] = $targetTime->format('Y-m-d') . ' '
+                    . sprintf('%2d', $targetTime->hour) . ':'
+                    . sprintf('%2d', $startMinute) . ':00';
+            }
+        }
+        return $timeOptions;
+    }
+}