A method for receiving a downlink control channel by a user equipment (UE) in a wireless communication system is disclosed. The method includes receiving downlink control information (DCI) indicating an aggregation level being a reference for allocating a downlink data channel to a control region, determining a last control channel element (CCE) index to which the downlink control channel is allocated, based on the received DCI, configuring a downlink control channel transmission region in consideration of the last CCE index and a resource region for one or more downlink control channel candidates corresponding to the aggregation level, and configuring a remaining control region except for the downlink control channel transmission region as a downlink data channel transmission region, and receiving the downlink control channel and the downlink data channel in the control region, based on the configured downlink control channel transmission region and the configured downlink data channel transmission region.