Disclosed is a method by which a terminal detects a discovery signal for device-to-device communication in a wireless communication system. Particularly, the method comprises the steps of: forming a discovery signal group, comprising the pre-set number of code words, on the basis of a discovery signal of a terminal of another user that is already known; receiving and decoding the predetermined discovery signal; and determining that the discovery signal of the other user's terminal is detected when the decoded discovery signal is included in the discovery signal group.