To actually realize an adaptive equalizing device as hardware, even when the length of delay time and the number of modulation multivalues to be object of compensation are large.

A training part 102 calculates a tap coefficient, an impulse response calculating part 103 calculates the impulse response of the tap coefficient, a tap selecting part 104 selects a tap on the basis of the magnitude of the impulse response, and a replica-generating part 105 generates a replica, only in the selected tap by multiplying a symbol for replica generation by the tap coefficient. The generating part 105 also generates the replica, so as not to overlap the same replica according to the control of a controlling part 106.