Apparatus and method for multicast and broadcast service in broadband wireless access system

An apparatus and a method for an MBS(Multicast and Broadcast Service) in a broadband wireless access system are provided to increase flexibility with respect to a broadcast service area by forming regions of a plurality of base station controllers as a single broadcast zone. A dividing unit(406) divides MBS data received from a contents server according to predetermined burst allocation information. A header generating unit(408) generates a header including absolute broadcast time information with respect to each segment from the dividing unit, and generates an MBS subpacket by adding the generated header. A transmission unit transmits the MBS subpacket from the header generating unit to at least one slave broadcast service controller belonging to the same broadcast zone. The absolute broadcast time information is recorded in a GRE(Generic Routing Encapsulation) header of the MBS subpacket. A memory(402) stores a predetermined broadcast composition table and burst allocation information with respect to respective contents. A buffer(404) stores MBS data received from the contents sever, and outputs the MBS data corresponding to the contents under the command of a controller(400).