The present invention relates to a method and apparatus for transmitting precoding information by a specific user equipment (UE) in a wireless communication system. More specifically, the present invention relates to a method comprising receiving group information from a base station (BS), the group information comprising information indicating a representative UE in a UE group and information indicating one or more member UEs, the specific UE being one of the one or more member UEs; receiving first control information transmitted from the representative UE or the BS, the first control information comprising first precoding information; determining second precoding information based on the first precoding information; and transmitting second control information comprising the determined second precoding information to the BS; and an apparatus therefor.