A radio broadcast receiver includes a broadcast reception and reproduction unit 1 for outputting a digital sound when being able to receive a digital signal included in a terrestrial digital radio broadcast, and for outputting an analog sound when being unable to receive the digital signal, and a control unit 3 for determining the broadcast type of the digital terrestrial broadcast received by the broadcast reception and reproduction unit 1 to carry out variable control of a transition time required to switch from an output of the analog sound to an output of the digital sound according to the determined broadcast type.