The present invention relates to a wireless communication system. More particularly, the present invention relates to a method and a device which enable a terminal to receive a control channel in a wireless communication system that uses multi-carriers, the method comprising the following steps: receiving a plurality of search space through a sub-frame, wherein each of the search spaces includes a plurality of control channel candidate sets and each of the search spaces corresponds to each of the carriers; and monitoring the control channel candidates for control channels, wherein the plurality of search spaces are connected in the resource region for the control channels according to an allocation pattern and with the starting point as the basis, and the allocation pattern changes according to time.