An apparatus for suppressing an intermodulation distortion component in a reception signal executes acquisition to acquire a plurality of transmission signals transmitted at frequencies different from each other, executes reception to receive a reception signal including an intermodulation distortion component caused by the plurality of transmission signals, executes generation to generate a replica of the intermodulation distortion component according to the plurality of transmission signals, executes normalization to normalize the reception signal so that the reception signal has certain amplitude, executes calculation to calculate a correlation value between the normalized reception signal and the replica, executes adjustment to adjust delay in the replica relative to the reception signal according to the correlation value, and executes combination to combine the replica for which the delay is adjusted with the reception signal.