Disclosed are a method of transmitting and receiving a downlink between a user equipment (UE) and a base station (BS) in a wireless communication system, and an apparatus for supporting the same. According to an embodiment applicable to the present disclosure, when the UE recognizes that plural transmission configuration indication (TCI) states related to one reference signal set are allocated to the UE through received downlink control information (DCI), the UE may receive/acquire a first physical downlink shared channel (PDSCH) scheduled by the DCI with high reliability.