Disclosed is a method of transmitting/receiving a broadcast message in a mobile communication system enabling to transmit a broadcast message including a video and the like. The present invention proposes an additional broadcast channel so as to transmit a broadcast message such as a video to a mobile station. Moreover, the present invention proposes a method of enabling a mobile station to confirm a summary or channel information so as to demand a broadcast message selectively by previously transmitting information, which is called a data burst summary message or a data burst message by the present invention, about the summary of the broadcast message or a channel through which the broadcast message will be transmitted prior to transmitting the broadcast message having large traffic volume.