Provided are a method for transmitting a discovery message by a terminal in a wireless communication system, and a terminal using the same. The method comprises: receiving a discovery response (discovery_response) message including a proximity service application code (ProSe application code: PAC); passing a discovery message generated on the basis of the PAC from an upper layer to a lower layer of the terminal; and transmitting the discovery message at the lower layer, wherein the upper layer of the terminal continuously and repetitively passes the discovery message with respect to the PAC to the lower layer until a timer for the PAC expires.