A multicarrier-signal transmitting apparatus comprising a rotation-amount setting unit configured to set a phase rotation amount for each subcarrier of a plurality of subcarrier groups, the phase rotation amount being set with a setting selected from a first setting and a second setting, the first setting being such that the phase rotation amount is different between a subcarrier group and an adjacent subcarrier group within a plurality of adjacent subcarrier groups, and the second setting being such that the phase rotation amount is identical between a subcarrier group and an adjacent subcarrier group within a plurality of adjacent subcarrier groups; and a phase rotator configured to add a phase rotation to reference signals and a data signal of said each subcarrier of said plurality of subcarrier groups based on the phase rotation amount.