A method for device-to-device (D2D) operation performed by a terminal in a radio resource control (RRC) idle state in a wireless communication system, and a terminal using the method are provided. The method comprises: determining whether a serving cell of the terminal is a suitable cell; determining whether the serving sell provides resource pool information; and, if the serving cell is a suitable cell, and the serving cell provides the resource pool information, transmitting a D2D signal within resources indicated by the resource pool information.