The present specification relates to a method which is for transmitting a Physical Uplink Shared Channel (PUSCH) in a wireless communication system, and is performed by a terminal. The method is characterized by including: a step for receiving, from a base station, information about a plurality of beam candidates for transmitting a PUSCH through a Sounding Reference Signal Resource Indicator (SRI) field or a Transmission Configuration Indicator (TCI) field of Downlink Control Information (DCI); a step for selecting any one beam among the plurality of beam candidates on the basis of a predefined criterion; and a step for transmitting the PUSCH by using the selected one beam.