A MIMO demodulating apparatus includes: a phase difference corrector that compensates for a phase shift by utilizing the phase difference between received signals to output phase corrected signals; an interference compensator that receives the phase corrected signals as input and, by means of adaptive control, performs elimination of interference and separation and extraction of a desired signal; a phase noise compensator to compensate for phase error remaining in the desired signal; a signal determiner that determines transmitted data from the output signal of the phase noise compensator to output the transmitted data and outputs an error signal; and an error signal phase rotator that subjects the error signal to a phase rotating process in accordance with the phase error compensation amount to perform adaptive control.