a synthesizer receiver includes a variable bandpass filter having a variable width passband to which an intermediate frequency signal is supplied ; a first detection circuit for detecting a level of an adjacent broadcast wave signal to enable supplying the detected output to the bandpass filter as a passband width control signal ; a second detection circuit for detecting the received electric field intensity having a frequency counter for counting the frequency of the output signal of the variable bandpass filter ; and a control circuit that checks the output detected by the second detection circuit during execution of a seek operation , controls the passband width of the variable bandpass filter to be switched to the wide band if the detected output of the second detection circuit indicates that the received electric field intensity is equal to or greater than a predetermined value , determines whether the detected output is tuned in to the broadcast wave signal based on the count value of the frequency counter , and stops the seek operation if the determination result indicates that the detected output is tuned in to the broadcast wave signal .