A communication device which includes an error correction encoder that generates an error correction encoded sequence. Additionally, there is an interleaver that arranges elements of the error correction encoded sequence generated by the error correction encoder. The interleaver arranges elements of the error correction encoded sequence in an order which is a same order as an order of the elements in the error correction encoded sequence, when the one of the error correction methods is a predetermined method. Further, the interleaver arranges elements of the error correction encoded sequence in an order different from the order of the elements in the error correction encoded sequence, when the one of the error correction methods is not the predetermined method.