Disclosed in one embodiment is an operating method of receiving user equipment (Rx UE) for performing sidelink communication in a wireless communication system, the method comprising the steps in which the Rx UE receives sidelink control information (SCI), and the Rx UE receives data related to the SCI, wherein the Rx UE determines the received data to be self-data on the basis of a first comparison between the destination ID and source ID included in the SCI, and the source ID and destination ID of the Rx UE, and a second comparison between the destination ID and source ID related to a MAC header of the data, and the source ID and destination ID of the Rx UE.