The present invention relates to a wireless access system supporting an unlicensed band, a method for configuring a shortened physical downlink shared channel (sPDSCH), a method for scheduling same, methods for transceiving same, and devices supporting same. A method for receiving a sPDSCH in a wireless access system supporting an unlicensed band, according to one embodiment of the present invention, comprising the steps of: monitoring a common search space for detecting downlink control information (DCI) comprising length information of a sPDSCH which is set in an unlicensed-band cell (Ucell) supporting an unlicensed band; receiving the DCI through the common search space; and receiving the sPDSCH on the basis of the length information, wherein the sPDSCH is received on a partial subframe (pSF), and the pSF may have a smaller size then a regular subframe.