A vestigial sideband (VSB) modulation apparatus includes a signal processing unit which extracts an I-axis data signal component and a Q-axis data signal component from a baseband signal with symbol data superimposed thereon, a band-limiting filter which frequency-shifts the I-axis data signal component and the Q-axis data signal component, extracted by the signal processing unit, by only a specific frequency smaller than a rate of the symbol data and limits a passband width by a frequency width smaller than the rate of the symbol data, and a quadrature modulating unit which obtains a VSB modulation signal by quadrature-modulating the I-axis data signal component and the Q-axis data signal component output from the band-limiting filter.