An audio demodulating circuit in accordance with the present invention for demodulating audio signals in a plurality of broadcast systems of mutually different frequency deviations such as the NTSC and the PAL, is arranged such that a connection between a trap circuit for suppressing adjacent interference and an intermediate frequency signal line can be controlled without using an externally applied special signal, based on a control voltage applied from a phase comparator with respect to a voltage control oscillator which generates a local oscillation signal for extracting an audio signal from the intermediate frequency signal.