Abstract: The present invention relates to a wireless communication system, and more particularly, a method and apparatus for handover of packet-switched service are disclosed. The method for handover of packet-switched (PS) service by a terminal according to one embodiment of the present invention comprises the steps of: transmitting a message, including information for notifying of a handover of one or more PS services to a second access network, to a network node during the performance of circuit-switched fallback (CSFB) on a first access network; performing the handover of said one or more PS services to the second access network; and establishing a voice call as a result of performing the CSFB.