A transmitting method in a mobile communication system, which has a base and mobile station that performs radio communication with the base station in a cell of a radio communication area formed by the base station, and mixes, allocates unicast data and broadcast/multicast data to subframes in a radio frame, and transmits the radio frame as downstream data from the base station to the mobile station, by the base station, multiplexing cell-specific pilot signals corresponding to the unicast data to a first subframe to where data is allocated, while multiplexing cell-specific pilot signals to a second subframe to where data is allocated, where the number of the cell-specific pilot signals allocated to the second subframe is different from the number of the cell-specific pilot signals allocated to the first subframe; setting a difference between the various start phase of cell-specific pilot signals transmitted in the various subframes.