diff --git a/event_payload.go b/event_payload.go
index 5924f4d..20f0e6f 100644
--- a/event_payload.go
+++ b/event_payload.go
@@ -40,6 +40,17 @@ type ChannelCreatedPayload struct {
 	Channel ChannelPayload `json:"channel"`
 }
 
+// ChannelTopicChangedPayload CHANNEL_TOPIC_CHANGEDイベントペイロード
+type ChannelTopicChangedPayload struct {
+	BasePayload
+	// Channel 変更されたチャンネル
+	Channel ChannelPayload `json:"channel"`
+	// Topic 変更後のトピック
+	Topic string `json:"topic"`
+	// Updater トピック更新者
+	Updater UserPayload `json:"updater"`
+}
+
 // UserCreatedPayload USER_CREATEDイベントペイロード
 type UserCreatedPayload struct {
 	BasePayload
diff --git a/events.go b/events.go
index da06cb8..365806e 100644
--- a/events.go
+++ b/events.go
@@ -13,6 +13,8 @@ const (
 	DirectMessageCreated = "DIRECT_MESSAGE_CREATED"
 	// ChannelCreated CHANNEL_CREATEDイベント
 	ChannelCreated = "CHANNEL_CREATED"
+	// ChannelTopicChanged CHANNEL_TOPIC_CHANGEDイベント
+	ChannelTopicChanged = "CHANNEL_TOPIC_CHANGED"
 	// UserCreated USER_CREATEDイベント
 	UserCreated = "USER_CREATED"
 )
diff --git a/helper.go b/helper.go
index 43412e2..9334afa 100644
--- a/helper.go
+++ b/helper.go
@@ -41,6 +41,11 @@ func (hs EventHandlers) SetChannelCreatedHandler(h func(payload *ChannelCreatedP
 	hs.SetHandler(ChannelCreated, func(event string, payload interface{}) { h(payload.(*ChannelCreatedPayload)) })
 }
 
+// SetChannelTopicChangedHandler イベントハンドラをセットします
+func (hs EventHandlers) SetChannelTopicChangedHandler(h func(payload *ChannelTopicChangedPayload)) {
+	hs.SetHandler(ChannelTopicChanged, func(event string, payload interface{}) { h(payload.(*ChannelTopicChangedPayload)) })
+}
+
 // SetUserCreatedHandler イベントハンドラをセットします
 func (hs EventHandlers) SetUserCreatedHandler(h func(payload *UserCreatedPayload)) {
 	hs.SetHandler(UserCreated, func(event string, payload interface{}) { h(payload.(*UserCreatedPayload)) })
diff --git a/server.go b/server.go
index 94420d6..6f3e4b5 100644
--- a/server.go
+++ b/server.go
@@ -76,6 +76,8 @@ func (bs *BotServer) ServeHTTP(rw http.ResponseWriter, req *http.Request) {
 		payload = &DirectMessageCreatedPayload{}
 	case ChannelCreated:
 		payload = &ChannelCreatedPayload{}
+	case ChannelTopicChanged:
+		payload = &ChannelTopicChangedPayload{}
 	case UserCreated:
 		payload = &UserCreatedPayload{}
 	default: