Abstract: A radio receiver consisting of a radio receiver circuit capable of the reception of one band such as the AM band and one or more adapters capable of the reception of other bands such as the FM band, the radio receiver circuit and the adapter housed in the same cabinet. Each adapter includes components such as a tuner, a detector and so on required for the reception of a desired band, and the output from a radio oscillator in the radio receiver circuit is converted into a voltage signal in response to which the tuning is carried out in the adapter. The number of reception bands may be increased in a simple manner depending upon the demand of the listener, and various operation control means such as a preset mechanism, a volume control and so on may be used in common among various adapters.