The present invention provides a method of user equipment transmitting aperiodic channel state information and user equipment using the method. The method includes receiving a channel state information request for a plurality of reference signals, receiving the plurality of reference signals, generating channel state information on each of the plurality of reference signals in response to the channel state information request, and transmitting the channel state information through a Physical Uplink Shared Channel (PUSCH), wherein the channel state information request is included in only some of subframes in which the plurality of reference signals is received.