A Doppler very high frequency omnidirectional range, DVOR, monitoring apparatus, comprising: a receiver which receives radio waves from a DVOR apparatus, the radio waves including a modulated carrier and a modulated subcarrier; a first signal extractor which extracts a signal of a carrier component from a reception signal obtained by the receiver; second and third signal extractors which extract a signal of a subcarrier component from the reception signal obtained by the receiver and shifts a phase of the signal of the subcarrier component by a phase difference equivalent to a prescribed distance away from the DVOR apparatus relative to the signal of the carrier component; a combiner which combines each output from the first, the second and the third signal extractors; a demodulator which demodulates an output signal from the combiner; and a monitor unit which performs operation confirmation of the DVOR apparatus based on the signal obtained by the demodulator; wherein the first signal extractor extracts the signal of the carrier component by frequency-converting the reception signal obtained by the receiver into a reception intermediate frequency signal including a local frequency being lower than the carrier component and the subcarrier component and by passing the reception intermediate frequency signal through a first bandpass filter; and the second and third signal extractors extract the signal of the subcarrier component by frequency-converting the reception signal obtained by the receiver into the reception intermediate frequency signal, shifting a phase of the reception intermediate frequency signal by the phase difference, and by passing the reception intermediate frequency signal through second and third bandpass filters differing in a passing band from each other and the first bandpass filter. a receiver which receives radio waves from a DVOR apparatus, the radio waves including a modulated carrier and a modulated subcarrier; a first signal extractor which extracts a signal of a carrier component from a reception signal obtained by the receiver; second and third signal extractors which extract a signal of a subcarrier component from the reception signal obtained by the receiver and shifts a phase of the signal of the subcarrier component by a phase difference equivalent to a prescribed distance away from the DVOR apparatus relative to the signal of the carrier component; a combiner which combines each output from the first, the second and the third signal extractors; a demodulator which demodulates an output signal from the combiner; and a monitor unit which performs operation confirmation of the DVOR apparatus based on the signal obtained by the demodulator; wherein the first signal extractor extracts the signal of the carrier component by frequency-converting the reception signal obtained by the receiver into a reception intermediate frequency signal including a local frequency being lower than the carrier component and the subcarrier component and by passing the reception intermediate frequency signal through a first bandpass filter; and the second and third signal extractors extract the signal of the subcarrier component by frequency-converting the reception signal obtained by the receiver into the reception intermediate frequency signal, shifting a phase of the reception intermediate frequency signal by the phase difference, and by passing the reception intermediate frequency signal through second and third bandpass filters differing in a passing band from each other and the first bandpass filter.