Disclosed are a method for a User Equipment (UE) transmitting a physical uplink shared channel (PUSCH) and a device therefor according to various embodiments. Disclosed are a method for transmitting a PUSCH and a device therefor, the method comprising the steps of: receiving an uplink (UL) grant from a base station; selecting at least one radio resource among a first radio resource which is a radio resource allocated by the UL grant, and a predetermined second radio resource; and transmitting a PUSCH using the selected at least one radio resource, wherein the second radio resource is a radio resource enabling PUSCH transmission without receiving the UL grant.