In the present invention, disclosed is a method for a base station transmitting a downlink control channel to a user equipment in a wireless communication system. More particularly, the method comprises the steps of: establishing resource element subsets comprising a plurality of resource elements; allocating a transmission resource for the downlink control channel in units of the resource element subsets; alternately allocating to the plurality of resource elements two antenna ports for demodulation-reference signal (DM-RS); and transmitting the downlink control channel to the user equipment through the transmission resource that is allocated by using the DM-RSs of the antenna ports that are allocated.