a transmission antenna for ejecting a transmitted signal which is comprised of a continuous wave;

a reception antenna which is comprised of two or more antenna components;

a mixer for mixing a received signal received by each of said two or more antenna components and said transmitted signal and for obtaining beat signals for two or more channels corresponding to said two or more antenna components;

a switcher provided between said mixer and said two or more antenna components, for selectively connecting said two or more antenna components with said mixer;

an A/D converter for sampling said beat signal obtained by said mixer with a predetermined sampling frequency and for obtaining received data respectively corresponding to said two or more antenna components for two or more channels; and

a target detector for detecting distance and relative speed of a target on the basis of said receiving data for said two or more channels which is sampled by said A/D converter, said electronic scanning radar apparatus, comprising:

a short time data cutter for cutting said sampled received data for two or more channels into two or more short time data in a time direction for each channel;

a frequency spectrum computing portion for computing frequency spectra of said two or more short time data for each said channel;

an interference frequency detector for detecting an interference element frequency of an interference wave from said frequency spectra;

two or more phase correctors, each corrector for producing two or more candidates of a frequency before aliasing of said interference wave from said interference element frequency of said interference wave, and for computing phase correcting amount for each candidate, and for correcting phase on said interference element frequency on the basis of said phase correcting amount;

two or more maximum peak direction extractors, each extractor for executing Digital Beamforming processing on said interference element frequency after respective phase corrections, and for extracting the maximum peak in an electric power of an azimuth direction on said each frequency candidate;

an interference direction selecter for selecting said frequency candidate showing the maximum peak power of the maximum peaks of said respective frequency candidates, and for estimating an arrival azimuth of said interference element from said azimuth of said maximum peak power of said selected frequency candidate;

an interference direction element remover for applying a filter for suppressing said interference element to said short time data cut out by said short time data cutting in said estimated arrival azimuth of said interference element so as to suppress said interference element; and

a buffer for merging said short time data wherein said interference element has been suppressed and for restoring to data having length before cutting;