An apparatus and method for performing a handover in a broadband wireless communication system is provided. In the broadband wireless communication system, a base station includes: a grouping unit for grouping mobile stations by using information on a movement path of each mobile station and information on a received signal strength of a neighboring base station, thereby constituting at least one group; a controller for modifying hystereses of remaining mobile stations among the mobile stations belonging to the same group, if a predetermined number of mobile stations perform handovers; and a transmitter for transmitting a message including modified hysteresis information to the remaining mobile stations belonging to the group.