diff --git a/app/channels/room_channel.rb b/app/channels/room_channel.rb
index 2436af1..cb41ae9 100644
--- a/app/channels/room_channel.rb
+++ b/app/channels/room_channel.rb
@@ -1,43 +1,47 @@
 class RoomChannel < ApplicationCable::Channel
-  attr_reader :log
+  attr_reader :subscriber
 
   def subscribed
     room = Room.find_by(key: params[:room_key])
     return reject if room.blank? || room.banned?(current_user)
 
-    @log = UserRoomLog.create! user: current_user,
-                               room: room,
-                               ip_address: ip_address
+    @subscriber = UserRoomLog.create! user: current_user,
+                                      room: room,
+                                      ip_address: ip_address
 
-    stream_for @log.uuid
+    stream_for @subscriber.uuid
     stream_from "room_#{room.id}"
   end
 
   def unsubscribed
     # 既に強制退出されているときは退出処理を行わない
-    return if @log.blank? || @log.room.banned?(current_user)
-    @log.exit
+    return if @subscriber.blank? || @subscriber.room.banned?(@subscriber.user)
+    @subscriber.exit
   end
 
   def now_playing_video
-    RoomChannel.broadcast_to @log.uuid,
-                             render_now_playing_video_json(@log.room)
+    @subscriber.touch # rubocop:disable Rails/SkipsModelValidations
+    RoomChannel.broadcast_to @subscriber.uuid,
+                             render_now_playing_video_json(@subscriber.room)
   end
 
   def play_list
-    RoomChannel.broadcast_to @log.uuid,
-                             render_play_list_json(@log.room)
+    @subscriber.touch # rubocop:disable Rails/SkipsModelValidations
+    RoomChannel.broadcast_to @subscriber.uuid,
+                             render_play_list_json(@subscriber.room)
   end
 
   def past_chats
-    RoomChannel.broadcast_to @log.uuid,
-                             render_past_chats_json(@log.room)
+    @subscriber.touch # rubocop:disable Rails/SkipsModelValidations
+    RoomChannel.broadcast_to @subscriber.uuid,
+                             render_past_chats_json(@subscriber.room)
   end
 
   def add_video(data)
-    return if current_user.blank?
+    @subscriber.touch # rubocop:disable Rails/SkipsModelValidations
+    return if @subscriber.user.blank?
 
-    video = @log.room.add_video(data["youtube_video_id"], current_user)
+    video = @subscriber.room.add_video(data["youtube_video_id"], @subscriber.user)
     return video if video.blank?
     add_message = video.add_user.name + "さんが「" + video.title + "」を追加しました。"
     Chat.create! room: video.room,
@@ -48,28 +52,31 @@ def add_video(data)
   end
 
   def exit_force(data)
-    return if current_user.blank?
+    @subscriber.touch # rubocop:disable Rails/SkipsModelValidations
+    return if @subscriber.user.blank?
 
     target = User.find(data["user_id"])
-    logs = @log.room.user_room_logs.online.where(user: target)
-    logs.each do |log|
-      RoomChannel.broadcast_to log.uuid,
+    online_subscribers = @subscriber.room.user_room_logs.online
+    target_subscribers = online_subscribers.where(user: target)
+    target_subscribers.each do |target_subscriber|
+      RoomChannel.broadcast_to target_subscriber.uuid,
                                render_error_json("force exit")
-      log.exit
+      target_subscriber.exit
     end
     BanReport.create! target: target,
-                      reporter: current_user,
-                      room: @log.room,
+                      reporter: @subscriber.user,
+                      room: @subscriber.room,
                       expiration_at: Time.now.utc + 60 * 60 * 24
   end
 
   def message(data)
-    return if current_user.blank?
+    @subscriber.touch # rubocop:disable Rails/SkipsModelValidations
+    return if @subscriber.user.blank?
 
-    Chat.create! room: @log.room,
+    Chat.create! room: @subscriber.room,
                  chat_type: "user",
                  message: data["message"],
-                 user: current_user
+                 user: @subscriber.user
   end
 
   private
diff --git a/app/models/user_room_log.rb b/app/models/user_room_log.rb
index 180b9f2..33ef66b 100644
--- a/app/models/user_room_log.rb
+++ b/app/models/user_room_log.rb
@@ -7,7 +7,7 @@ class UserRoomLog < ApplicationRecord
   after_create :send_enter_message
   after_update :send_exit_message, if: proc { |log| log.exit_at_before_last_save.blank? && log.exit_at.present? }
 
-  scope :online, -> { where exit_at: nil }
+  scope :online, -> { where(exit_at: nil).where(updated_at: 1.hour.ago..Time.current) }
 
   def exit
     update! exit_at: Time.now.utc
diff --git a/spec/channels/room_channel_spec.rb b/spec/channels/room_channel_spec.rb
index d8a957c..bdfbaba 100644
--- a/spec/channels/room_channel_spec.rb
+++ b/spec/channels/room_channel_spec.rb
@@ -4,8 +4,8 @@
   let(:room) { create(:room) }
   let(:room_key) { room.key }
   let(:user) { create(:user) }
-  let(:log) { subscription.log }
-  let(:target) { RoomChannel.broadcasting_for([RoomChannel.channel_name, log.uuid]) }
+  let(:subscriber) { subscription.subscriber }
+  let(:target) { RoomChannel.broadcasting_for([RoomChannel.channel_name, subscriber.uuid]) }
   let(:stream_from) { "room_" + room.id.to_s }
   let(:current_user) { user }
   before { stub_connection current_user: current_user, ip_address: "0.0.0.0" }
@@ -103,7 +103,7 @@
     before { subscribe room_key: room.key }
     it { expect { subject }.to change(Chat, :count).by(1) }
     it { expect { subject }.to change { room.online_users.count }.by(-1) }
-    it { expect { subject }.to change { log.exit_at }.from(nil).to(Time) }
+    it { expect { subject }.to change { subscriber.exit_at }.from(nil).to(Time) }
 
     context "without login" do
       let(:current_user) { nil }
@@ -113,7 +113,7 @@
           to change(Chat, :count).by(0).
                and change { room.online_users.count }.by(0)
       }
-      it { expect { subject }.to change { log.exit_at }.from(nil).to(Time) }
+      it { expect { subject }.to change { subscriber.exit_at }.from(nil).to(Time) }
     end
 
     context "of duplicate subscription" do
@@ -124,7 +124,7 @@
           to change(Chat, :count).by(0).
                and change { room.online_users.count }.by(0)
       }
-      it { expect { subject }.to change { log.exit_at }.from(nil).to(Time) }
+      it { expect { subject }.to change { subscriber.exit_at }.from(nil).to(Time) }
     end
   end
 
diff --git a/spec/models/user_room_log_spec.rb b/spec/models/user_room_log_spec.rb
index 212b76d..2aed68e 100644
--- a/spec/models/user_room_log_spec.rb
+++ b/spec/models/user_room_log_spec.rb
@@ -5,4 +5,36 @@
     log = build(:user_room_log)
     expect(log).to be_valid
   end
+
+  describe "#online" do
+    subject { UserRoomLog.online }
+
+    let(:updated_at) { Time.now.utc }
+
+    before { create(:user_room_log, exit_at: exit_at, updated_at: updated_at) }
+
+    context "when exit_at is nil" do
+      let(:exit_at) { nil }
+
+      it "returns a log" do
+        expect(subject.size).to eq 1
+      end
+
+      context "and updated_at is out of date" do
+        let(:updated_at) { Time.now.utc - 60 * 60 - 10 }
+
+        it "did not returns a log" do
+          expect(subject.size).to eq 0
+        end
+      end
+    end
+
+    context "when exit_at exist" do
+      let(:exit_at) { Time.now.utc - 10 }
+
+      it "did not returns a log" do
+        expect(subject.size).to eq 0
+      end
+    end
+  end
 end