diff --git a/.gitignore b/.gitignore
index 0917f87..940c6ef 100644
--- a/.gitignore
+++ b/.gitignore
@@ -453,3 +453,4 @@
 !.vscode/launch.json
 !.vscode/extensions.json
 /.vscode
+/VQCalendarAttention/.env
diff --git a/VQCalendarAttention/DiscordWebhook.cs b/VQCalendarAttention/DiscordWebhook.cs
new file mode 100644
index 0000000..394cde2
--- /dev/null
+++ b/VQCalendarAttention/DiscordWebhook.cs
@@ -0,0 +1,34 @@
+using System;
+using System.Net.Http;
+using System.Net.Http.Headers;
+using System.Text;
+using System.Threading.Tasks;
+using Newtonsoft.Json;
+
+namespace VestalisQuintet.VQCalendarAttention
+{
+    public class DiscordWebhook
+    {
+        /// <summary>
+        /// webhookのURLを保持する
+        /// </summary>
+        private readonly string _webhookUrl;
+
+        public DiscordWebhook(string webhookUrl)
+        {
+            _webhookUrl = webhookUrl;
+        }
+
+        public async Task SendMessageAsync(string message)
+        {
+            using (var httpClient = new HttpClient())
+            {
+                var content = new StringContent(JsonConvert.SerializeObject(new { content = message }), Encoding.UTF8, "application/json");
+                httpClient.DefaultRequestHeaders.Accept.Add(new MediaTypeWithQualityHeaderValue("application/json"));
+
+                var response = await httpClient.PostAsync(_webhookUrl, content);
+                response.EnsureSuccessStatusCode();
+            }
+        }
+    }
+}
diff --git a/VQCalendarAttention/Program.cs b/VQCalendarAttention/Program.cs
index 5222b68..0a5cac5 100644
--- a/VQCalendarAttention/Program.cs
+++ b/VQCalendarAttention/Program.cs
@@ -7,15 +7,14 @@
 {
     public class Program
     {
-        private const string CredentialsFilePath = "../calendartowebhook-fa30e21f081f.json";
-        private const string CalendarId = "3e39821e10e795b311f93c79490960c3196632a465a794ca32e8a44c50115dde@group.calendar.google.com";
-
         public static void Main(string[] args)
         {
+            DotNetEnv.Env.Load(".env");
+
             CreateHostBuilder(args).Build().Run();
 
             // テストとしてCalendarApiTestを実行する
-            // await CalendarApiTest.GetLatestEventAsync("3e39821e10e795b311f93c79490960c3196632a465a794ca32e8a44c50115dde@group.calendar.google.com", "../calendartowebhook-fa30e21f081f.json");
+            // await CalendarApiTest.GetLatestEventAsync(DotNetEnv.Env.GetString("CALENDAR_ID"), DotNetEnv.Env.GetString("CREDENTIALS_FILE_PATH"));
         }
 
         public static IHostBuilder CreateHostBuilder(string[] args) =>
@@ -24,7 +23,7 @@
                 {
                     // Cronosで定義したCronジョブサービスを追加
                     // 翌日の予定を通知する
-                    services.AddHostedService<NextDayCalendarAttentionService>(serviceProvider =>
+                    services.AddHostedService(serviceProvider =>
                     {
                         // Cron式を設定 (例: 毎日午前9時に実行)
                         //var cronExpression = CronExpression.Parse("0 9 * * *");
@@ -35,7 +34,9 @@
                         // タイムゾーンを東京に設定
                         var timeZoneInfo = TimeZoneInfo.FindSystemTimeZoneById("Tokyo Standard Time");
 
-                        return new NextDayCalendarAttentionService(cronExpression, timeZoneInfo, serviceProvider, CredentialsFilePath, CalendarId);
+                        string calendarId = DotNetEnv.Env.GetString("CALENDAR_ID");
+                        string CredentialsFilePath = DotNetEnv.Env.GetString("CREDENTIALS_FILE_PATH");
+                        return new NextDayCalendarAttentionService(cronExpression, timeZoneInfo, serviceProvider, CredentialsFilePath, calendarId);
                     });
                 });
     }
diff --git a/VQCalendarAttention/Services/NextDayCalendarAttentionService.cs b/VQCalendarAttention/Services/NextDayCalendarAttentionService.cs
index 09f87dc..c893df0 100644
--- a/VQCalendarAttention/Services/NextDayCalendarAttentionService.cs
+++ b/VQCalendarAttention/Services/NextDayCalendarAttentionService.cs
@@ -1,4 +1,5 @@
 using System;
+using System.Text;
 using Cronos;
 using Google.Apis.Calendar.v3;
 using Microsoft.Extensions.DependencyInjection;
@@ -63,11 +64,30 @@
             // 明日の予定を表示
             if (tomorrowEvents.Count > 0)
             {
-                Console.WriteLine("明日の予定:");
+                // DiscordWebhook インスタンスを作成
+                string webhookUrl = DotNetEnv.Env.GetString("DISCORD_WEBHOOK_URL");
+                var discordWebhook = new DiscordWebhook(webhookUrl);
+
+                // 通知先ロールIDを指定
+                string roleId = DotNetEnv.Env.GetString("DISCORD_ROLE_ID");
+
+                // 明日の予定をメッセージとして組み立て
+                var sb = new StringBuilder("明日の予定:\n");
                 foreach (var tomorrowEvent in tomorrowEvents)
                 {
-                    Console.WriteLine($"{tomorrowEvent.Summary}: {tomorrowEvent.Start.DateTime}");
+                    var importanceMention = "";
+                    // カレンダーの予定の説明欄に[重要]と入ってたら、オーネグスメンバー宛にメンションを入れるようにする
+                    if (tomorrowEvent.Description != null && tomorrowEvent.Description.Contains("[重要]"))
+                    {
+                        importanceMention = $" <@&{roleId}>";
+                    }
+                    sb.AppendLine($"{tomorrowEvent.Summary}: {tomorrowEvent.Start.DateTime}{importanceMention}");
                 }
+
+                // メッセージをDiscordに送信
+                await discordWebhook.SendMessageAsync(sb.ToString());
+
+                Console.WriteLine(sb.ToString());
             }
             else
             {
diff --git a/VQCalendarAttention/VQCalendarAttention.csproj b/VQCalendarAttention/VQCalendarAttention.csproj
index 08d087f..1a0f4d0 100644
--- a/VQCalendarAttention/VQCalendarAttention.csproj
+++ b/VQCalendarAttention/VQCalendarAttention.csproj
@@ -9,6 +9,7 @@
 
   <ItemGroup>
     <PackageReference Include="Cronos" Version="0.7.1" />
+    <PackageReference Include="DotNetEnv" Version="2.5.0" />
     <PackageReference Include="Google.Apis.Calendar.v3" Version="1.60.0.3017" />
     <PackageReference Include="Microsoft.Extensions.DependencyInjection" Version="7.0.0" />
     <PackageReference Include="Microsoft.Extensions.Hosting" Version="7.0.1" />