The present disclosure relates to a method for monitoring a search space (SS) through a preconfigured uplink resource (PUR) in a wireless communication system, and an apparatus therefor comprising: receiving PUR configuration information related to a repetition number of uplink signal transmission based on the PUR, in a radio resource control (RRC) connected state; transitioning from the RRC connected state to a specific state for a PUR operation; transmitting an uplink signal on a first resource of the PUR based on the repetition number; monitoring a PUR SS after a specific time offset from a transmission timing of the uplink signal; receiving, from the base station, an early acknowledgment (early ACK) for the uplink signal; and stopping, based on a reception of the early ACK, transmission of the uplink signal before a number of transmissions of the uplink signal reaches the repetition number.