diff --git a/TVTComment/Model/ChatCollectService/NiconicoLiveChatCollectService.cs b/TVTComment/Model/ChatCollectService/NiconicoLiveChatCollectService.cs
index ed78816..dca9fac 100644
--- a/TVTComment/Model/ChatCollectService/NiconicoLiveChatCollectService.cs
+++ b/TVTComment/Model/ChatCollectService/NiconicoLiveChatCollectService.cs
@@ -48,6 +48,7 @@ protected ChatReceivingException(
         private readonly NiconicoUtils.NicoLiveCommentSender commentSender;
         private DateTime lastHeartbeatTime = DateTime.MinValue;
         private readonly CancellationTokenSource cancel = new CancellationTokenSource();
+        private NiconicoUtils.NiconicoLoginSession session;
 
         public NiconicoLiveChatCollectService(
             ChatCollectServiceEntry.IChatCollectServiceEntry serviceEntry, string liveId,
@@ -56,6 +57,7 @@ NiconicoUtils.NiconicoLoginSession session
         {
             this.ServiceEntry = serviceEntry;
             this.originalLiveId = liveId;
+            this.session = session;
 
             var assembly = Assembly.GetExecutingAssembly().GetName();
             var ua = assembly.Name + "/" + assembly.Version.ToString(3);
@@ -131,6 +133,8 @@ private async Task collectChat(CancellationToken cancel)
             }
             catch (HttpRequestException e)
             {
+                if (e.StatusCode == System.Net.HttpStatusCode.Unauthorized)
+                    this.session.BadSession = true;
                 throw new ChatReceivingException("サーバーとの通信でエラーが発生しました", e);
             }
             var playerStatus = await JsonDocument.ParseAsync(playerStatusStr, cancellationToken: cancel).ConfigureAwait(false);
diff --git a/TVTComment/Model/ChatService/NiconicoChatService.cs b/TVTComment/Model/ChatService/NiconicoChatService.cs
index 83b33ac..ea06ecd 100644
--- a/TVTComment/Model/ChatService/NiconicoChatService.cs
+++ b/TVTComment/Model/ChatService/NiconicoChatService.cs
@@ -10,6 +10,10 @@ class NiconicoChatServiceSettings
     {
         public string UserId { get; set; } = "";
         public string Password { get; set; } = "";
+        // ログインセッションを保持する
+        public string NicoSid { get; set; } = "";
+        public string Session { get; set; } = "";
+        public string SessionSecure { get; set; } = "";
     }
 
     class NiconicoChatService : IChatService
@@ -35,6 +39,18 @@ public string UserPassword
             get { return this.settings.Password; }
         }
         public bool IsLoggedin { get; private set; }
+        public string NicoSid
+        {
+            get { return this.settings.NicoSid; }
+        }
+        public string Session
+        {
+            get { return this.settings.Session; }
+        }
+        public string SessionSecure
+        {
+            get { return this.settings.SessionSecure; }
+        }
 
         public NiconicoChatService(
             NiconicoChatServiceSettings settings, ChannelDatabase channelDatabase,
@@ -48,7 +64,7 @@ public NiconicoChatService(
             try
             {
                 if(!string.IsNullOrWhiteSpace(UserId) && !string.IsNullOrWhiteSpace(UserPassword))
-                    SetUser(UserId, UserPassword).Wait();
+                    SetUser(UserId, UserPassword, NicoSid, Session, SessionSecure).Wait();
             }
             catch (AggregateException e)
             when (e.InnerExceptions.Count == 1 && e.InnerExceptions[0] is NiconicoUtils.NiconicoLoginSessionException)
@@ -68,9 +84,12 @@ public NiconicoChatService(
         /// </summary>
         /// <param name="userId">ニコニコのユーザーID</param>
         /// <param name="userPassword">ニコニコのパスワード</param>
+        /// <param name="nicoSid">ログインセッション(nicosid)</param>
+        /// <param name="session">ログインセッション(user_session)</param>
+        /// <param name="sessionSecure">ログインセッション(user_session_secure)</param>
         /// <exception cref="ArgumentException"><paramref name="userId"/>または<paramref name="userPassword"/>がnull若しくはホワイトスペースだった時</exception>
         /// <exception cref="NiconicoUtils.NiconicoLoginSessionException">ログインに失敗した時</exception>
-        public async Task SetUser(string userId, string userPassword)
+        public async Task SetUser(string userId, string userPassword, string nicoSid, string session, string sessionSecure)
         {
             if (string.IsNullOrWhiteSpace(userId))
                 throw new ArgumentException($"{nameof(userId)} must not be null nor white space", nameof(userId));
@@ -78,13 +97,16 @@ public async Task SetUser(string userId, string userPassword)
                 throw new ArgumentException($"{nameof(userPassword)} must not be null nor white space", nameof(userPassword));
 
             //ログインしてみる
-            var tmpSession = new NiconicoUtils.NiconicoLoginSession(userId, userPassword);
+            var tmpSession = new NiconicoUtils.NiconicoLoginSession(userId, userPassword, nicoSid, session, sessionSecure);
             await tmpSession.Login().ConfigureAwait(false);
 
             //成功したら設定、セッションを置き換える
             this.IsLoggedin = true;
             this.settings.UserId = userId;
             this.settings.Password = userPassword;
+            this.settings.NicoSid = tmpSession.nicosid;
+            this.settings.Session = tmpSession.session;
+            this.settings.SessionSecure = tmpSession.secure;
             try
             {
                 await (this.loginSession.Value?.Logout() ?? Task.CompletedTask);
diff --git a/TVTComment/Model/NiconicoUtils/NiconicoLoginSession.cs b/TVTComment/Model/NiconicoUtils/NiconicoLoginSession.cs
index 1145b94..51fffb7 100644
--- a/TVTComment/Model/NiconicoUtils/NiconicoLoginSession.cs
+++ b/TVTComment/Model/NiconicoUtils/NiconicoLoginSession.cs
@@ -42,8 +42,12 @@ class NiconicoLoginSession
     {
         private string mail;
         private string password;
+        public string nicosid { get; private set; }
+        public string session { get; private set; }
+        public string secure { get; private set; }
         private CookieCollection cookie = null;
 
+        public bool BadSession = false;
         public bool IsLoggedin => cookie != null;
         /// <summary>
         /// 送信するべき認証情報を含んだクッキー
@@ -60,10 +64,13 @@ public CookieCollection Cookie
             }
         }
 
-        public NiconicoLoginSession(string mail, string password)
+        public NiconicoLoginSession(string mail, string password, string nicosid, string session, string secure)
         {
             this.mail = mail;
             this.password = password;
+            this.nicosid = nicosid;
+            this.session = session;
+            this.secure = secure;
         }
 
         /// <summary>
@@ -74,9 +81,20 @@ public NiconicoLoginSession(string mail, string password)
         /// <exception cref="NetworkNiconicoLoginSessionException"></exception>
         public async Task Login()
         {
-            if (this.IsLoggedin)
+            if (!this.BadSession && this.IsLoggedin)
                 throw new InvalidOperationException("すでにログインしています");
 
+            if (!this.BadSession && nicosid != null && nicosid.Length > 0 && session != null && session.Length > 0 && secure != null && secure.Length > 0)
+            {
+                this.cookie = new CookieCollection();
+
+                this.cookie.Add(new Cookie("nicosid", nicosid, "/", "nicovideo.jp"));
+                this.cookie.Add(new Cookie("user_session", session, "/", "nicovideo.jp"));
+                this.cookie.Add(new Cookie("user_session_secure", secure, "/", "nicovideo.jp"));
+
+                return;
+            }
+
             const string loginUrl = "https://secure.nicovideo.jp/secure/login?site=niconico";
 
             var handler = new HttpClientHandler();
@@ -102,6 +120,16 @@ public async Task Login()
             if (cookieCollection.All(x => x.Name != "user_session"))
                 throw new LoginFailureNiconicoLoginSessionException();
 
+            Cookie cookieNicosid = cookieCollection.Where(x => x.Name == "nicosid").Single();
+            Cookie cookieSession = cookieCollection.Where(x => x.Name == "user_session").Single();
+            Cookie cookieSecure = cookieCollection.Where(x => x.Name == "user_session_secure").Single();
+
+            this.nicosid = cookieNicosid.Value;
+            this.session = cookieSession.Value;
+            this.secure = cookieSecure.Value;
+
+            this.BadSession = false;
+
             this.cookie = cookieCollection;
         }
 
@@ -128,6 +156,9 @@ public async Task Logout()
                 throw new NetworkNiconicoLoginSessionException(e);
             }
             this.cookie = null;
+            this.nicosid = null;
+            this.session = null;
+            this.secure = null;
         }
     }
 }
diff --git a/TVTComment/ViewModels/SettingsWindowViewModel.cs b/TVTComment/ViewModels/SettingsWindowViewModel.cs
index 79d3b64..48641cb 100644
--- a/TVTComment/ViewModels/SettingsWindowViewModel.cs
+++ b/TVTComment/ViewModels/SettingsWindowViewModel.cs
@@ -15,6 +15,9 @@ class SettingsWindowViewModel : BindableBase
         public ObservableValue<string> NiconicoLoginStatus { get; } = new ObservableValue<string>();
         public ObservableValue<string> NiconicoUserId { get; } = new ObservableValue<string>();
         public ObservableValue<string> NiconicoPassword { get; } = new ObservableValue<string>();
+        public ObservableValue<string> NiconicoSid { get; } = new ObservableValue<string>();
+        public ObservableValue<string> NiconicoSession { get; } = new ObservableValue<string>();
+        public ObservableValue<string> NiconicoSecure { get; } = new ObservableValue<string>();
         public ObservableValue<string> NichanResCollectInterval { get; } = new ObservableValue<string>();
         public ObservableValue<string> NichanThreadSearchInterval { get; } = new ObservableValue<string>();
         public ObservableValue<string> NichanApiHmKey { get; } = new ObservableValue<string>();
@@ -52,7 +55,7 @@ public SettingsWindowViewModel(Model.TVTComment model)
 
                   try
                   {
-                      await niconico.SetUser(NiconicoUserId.Value, NiconicoPassword.Value);
+                      await niconico.SetUser(NiconicoUserId.Value, NiconicoPassword.Value, NiconicoSid.Value, NiconicoSession.Value, NiconicoSecure.Value);
                       syncNiconicoUserStatus();
                   }
                   catch (Model.NiconicoUtils.NiconicoLoginSessionException)
@@ -97,6 +100,9 @@ private void syncNiconicoUserStatus()
             NiconicoLoginStatus.Value = niconico.IsLoggedin ? "ログイン済" : "未ログイン";
             NiconicoUserId.Value = niconico.UserId;
             NiconicoPassword.Value = niconico.UserPassword;
+            NiconicoSid.Value = niconico.NicoSid;
+            NiconicoSession.Value = niconico.Session;
+            NiconicoSecure.Value = niconico.SessionSecure;
         }
 
         private void syncNichanSettings()