In a transmission device, a coder performs SFBC block coding of a signal stream includes a divider equally dividing the stream into sub-streams of time lengths Msub and performs a cyclic shift of one or more sub-streams, a processor outputs the sub-streams and performs, on the sub-streams, time-axis inversion processing, complex conjugate processing and sign inversion processing, or the time-axis inversion processing and the complex conjugate processing, a phase rotation unit generates a repetitive signal of a time length N in which an output signal of the processor is reproduced and arranged, and giving phase rotation to the repetitive signal, and a multiplexer generates, for each transmission antenna, a signal transmitted from the antenna, by multiplexing the repetitive signals given the phase rotation, and the unit gives different phase rotations to repetitive signals multiplexed to an identical transmission signal.