Each of antenna system processors of a radar receiver generates, through correlation calculation of a reflection signal and a radar transmission signal, an array correlation signal for each delay in arrival of the reflection signal at each Doppler frequency. A static target candidate extractor extracts, on the basis of outputs of the antenna system processors and a Doppler frequency of a reflection signal from a static target located at a side of a moving body, array correlation signals corresponding to a candidate for the static target. A reference signal detector outputs a reference signal regarding the side of the moving body using, among the outputs of the static target candidate extractor, array correlation signals whose consistency is high. A correction value calculator calculates, using outputs of the reference signal detector, a correction value for correcting deviations between reception antennas included in an array antenna.