Disclosed are a method for transceiving data in a wireless access system, and a base station and terminal therefor. More particularly, the present invention relates to a method for transceiving data, and to a base station device for the method, wherein the method comprises the steps of: transmitting, in a single first subframe, a physical downlink control channel (PDCCH) including downlink scheduling information on each terminal; and transmitting, in a plurality of second subframes, a physical downlink shared channel (PDSCH) relevant to said PDCCH to each terminal. The PDCCH supports a carrier aggregation that includes a field indicating said plurality of second subframes in which said PDSCH is transmitted.