Disclosed is a method for transmitting multicast broadcast service (MBS) data in a wireless communication system, the method comprising: transmitting an MBS MAP, which comprises MBS AAI subframe offset and MBS resource index. MBS AAI subframe offset and MBS resource index indicate the end subframe (i.e., subframe offset) of MBS data and the number of resource units in the end subframe of the MBS data burst and resource allocation information about an MBS data burst, to a mobile station; and allocating resources as many as the number of resource units which is appointed by the MBS subframe offset and MBS resource index from transmission starting point of the MBS data burst on the basis of the resource allocation information and transmitting the MBS data burst using the allocated resources to the mobile station