The invention is embodied for solving a problem of occurrence of degradation of the reception characteristic caused by the interference signal component if a symbol making a determination error is contained or if an error factor caused by a propagation channel estimation error or a hardware error (carrier frequency error, sampling frequency error) is contained at the interference canceling time in a wireless communication apparatus for iteratively decoding and receiving a spatial multiplex signal. A wireless communication apparatus 100 according to the invention has an error estimator 13 for estimating an error of a replica signal at the interference canceling time and a weighter 14 for weighting likelihood information for a spatial multiplex signal separated and combined after interference is canceled based on output of the error estimator 13, whereby if an error of the replica signal at the interference canceling time is contained, a good reception characteristic can be provided.