To provide a mobile communication station of CDMA system, capable of multiple communications in parallel using a small-scale circuit.

A mobile station which transmits spread signals that are obtained by spreading transmission signals to be sent to a communication party to a base station which functions as a repeater station to the party, is provided with a first spread code generating means for generating first spread codes to spread sound signals, a second spread code generating means for generating second spread codes that are different from the first ones, by spreading non- sound signals, a first spread processing means for spreading the sound signals using the first spread codes, a second spread processing means for spreading the non-sound signals using the second spread codes, and a transmitting means for transmitting respectively the spread sound signals and spread non-sound signals to the base station.