A radio communication apparatus includes a clock reproducer unit which repetitively detects a symbol timing from a Nyquist point in detection-result data. A symbol generator unit controllably generates or non-generates a to-be-transmitted symbol or symbols at every symbol timing detected by the clock reproducer unit, converts the to-be-transmitted symbol or symbols into modulating data pieces, and outputs the modulating data pieces to a FIFO buffer. A D/A converter reads out modulating data pieces from the FIFO buffer at a predetermined rate and converts the read-out modulating data pieces into an analog modulating signal for use in modulation of a carrier. A controller unit controls a number of the to-be-transmitted symbol or symbols generated by the symbol generator unit at every symbol timing to hold a number of modulating data pieces in the FIFO buffer in a predetermined range.