A method for transmitting a sidelink discovery signal in a wireless communication system, the method is performed by a user equipment (UE) and includes: determining a transmit power for the sidelink discovery signal, and transmitting the sidelink discovery signal with the transmit power, wherein the transmit power is determined based on discMaxTxPower, and wherein the discMaxTxPower informs a parameter used to calculate a maximum transmit power of the UE configured with a concerned range class.