A MIMO multiple transmission device, comprising a packet data block generator (111) for generating a packet data block as a resent unit for hybrid ARQ; a CRC adder (112) for adding an error detection code; a channel encoder (113) for performing channel encoding, the packet data block generator, the CRC adder and the channel encoder being coupled in series in one or more data streams; a parallel-to-serial converter (114) for converting output of the channel encoder to serial form; an interleaver between transmission streams (115) for performing interleaving between transmission streams on outputs from the parallel-to-serial converter; a serial-to-parallel converter (116) for converting outputs from the interleaver between transmission streams to parallel form; a coding rate changer (117) for changing a coding rate; and a data modulator (119) for modulating data, the coding rate changer and the data modulator being connected in series in plural data streams divided by the serial-to-parallel converter.