A method of monitoring a downlink control channel by a user equipment performing D2D (device-to-device) communication in a wireless communication system, and a user equipment therefore are discussed. The method according to an embodiment includes receiving information of a plurality of first subframes for counting a DRX (discontinuous reception) timer via a high layer signaling, the first subframes being located so as not to overlap with second subframes for D2D signal transmission; monitoring the downlink control channel at the plurality of first subframes; and counting the DRX timer, when the monitoring the downlink control channel is performed on the plurality of first subframes.