A reception method adapted to a reception device of a multicarrier wireless communication system adopting forward error correction codes with respect to wireless signals constituted of a plurality of sub-carriers, said reception method comprising: an interference band detection process (Sl, Sa2, Sb2) that selects specific sub-carriers causing reception errors from among the plurality of sub-carriers; a weight coefficient generation process (S2, Sa3, Sb3) that generates weight coefficients for reducing reliability with respect to the selected specific sub-carriers and not the other sub-carriers, a weight coefficient involving a lowest reliability value among demodulated values of sub-carriers with respect to the specific sub-carrier; a demodulation process that demodulates sub-carriers of received wireless signals; a weighted calculation process (S3, Sa4, Sb4) that performs weighted calculation using weight coefficients on demodulated values of sub-carriers of received wireless signals; and a decoding process that performs a decoding process for correcting errors on demodulated values of sub-carriers of received wireless signals already subjected to the weighted calculation, wherein the interference band detection process (S1, Sa2, Sb2) detects a frequency band of a specific sub-carrier susceptible to an interference wave among the plurality of sub-carriers of received wireless signals, thus outputting interference band information; the weight coefficient generation process (S2, Sa3, Sb3) generates weight coefficients based on the interference band information, by which reliability is reduced in an interference band and not in a frequency band of a specific sub-carrier insusceptible to the interference wave; said reception method further including: a permutation process (Sa5, Sb5) which selects demodulated values- of sub-carriers of received wireless signals already subjected to the weighed calculation such that, for a specific sub-carrier causing an interference wave, the demodulated value of the specific sub-carrier assigned to the interference band is replaced with a demodulated value which is the previously decoded demodulated value with respect to said sub-carrier when such a previously decoded demodulated value exists. an interference band detection process (Sl, Sa2, Sb2) that selects specific sub-carriers causing reception errors from among the plurality of sub-carriers; a weight coefficient generation process (S2, Sa3, Sb3) that generates weight coefficients for reducing reliability with respect to the selected specific sub-carriers and not the other sub-carriers, a weight coefficient involving a lowest reliability value among demodulated values of sub-carriers with respect to the specific sub-carrier; a demodulation process that demodulates sub-carriers of received wireless signals; a weighted calculation process (S3, Sa4, Sb4) that performs weighted calculation using weight coefficients on demodulated values of sub-carriers of received wireless signals; and a decoding process that performs a decoding process for correcting errors on demodulated values of sub-carriers of received wireless signals already subjected to the weighted calculation, wherein the interference band detection process (S1, Sa2, Sb2) detects a frequency band of a specific sub-carrier susceptible to an interference wave among the plurality of sub-carriers of received wireless signals, thus outputting interference band information; the weight coefficient generation process (S2, Sa3, Sb3) generates weight coefficients based on the interference band information, by which reliability is reduced in an interference band and not in a frequency band of a specific sub-carrier insusceptible to the interference wave; said reception method further including: a permutation process (Sa5, Sb5) which selects demodulated values- of sub-carriers of received wireless signals already subjected to the weighed calculation such that, for a specific sub-carrier causing an interference wave, the demodulated value of the specific sub-carrier assigned to the interference band is replaced with a demodulated value which is the previously decoded demodulated value with respect to said sub-carrier when such a previously decoded demodulated value exists. a permutation process (Sa5, Sb5) which selects demodulated values- of sub-carriers of received wireless signals already subjected to the weighed calculation such that, for a specific sub-carrier causing an interference wave, the demodulated value of the specific sub-carrier assigned to the interference band is replaced with a demodulated value which is the previously decoded demodulated value with respect to said sub-carrier when such a previously decoded demodulated value exists.