Abstract: A radiotelephone equipment for use in a vehicle is constructed in such a way that a telephone function unit and a transceiver are incorporated together in a case as a unitary member and the case is designed to have the same external form and size as those of a fitting recess for audio equipment which is provided on the center console serving as a supporting section within a compartment of the vehicle. The fitting recess is designed to have the same required standard size as that determined for the external form of the audio equipment, whereby the vehicular radiotelephone equipment and the audio equipment can be fitted together in the compartment of the vehicle to enhance the unity therein.