The present specification discloses a method for executing a hybrid automatic request (HARQ) in a wireless communication system, the method, which is executed by a terminal, comprising the steps of: receiving an initial HARQ packet corresponding to a specific HARQ process ID (PID) from a first base station via a first wireless link; receiving a retransmission HARQ packet corresponding to the HARQ PID from a second base station via a second wireless link; combining the initial HARQ packet and the retransmission HARQ packet; decoding the combined HARQ packet; and, on the basis of the result of the decoding, determining whether to transmit HARQ feedback via the first wireless link.