To realize proper radio communication by selecting a combination of transmitting antennas, according to the correlation between propagation channels formed by transmitting channels among a plurality of transmitting antennas.

A radio transmitter is provided with the plurality of transmitting antennas (Tx1 to TxN) capable of transmitting a radio signal, an acquiring part (21) for acquiring propagation path response information, showing a propagation path response formed by each of the transmitting antennas and a receiving antenna of the opposite communication party, and a selection control part (22, 26, 27 and 28) for calculating a selection index value, representing correlation between propagation path responses from the acquired propagation path response information and selects some from among the plurality of transmitting antennas on the basis of the selection index value, and uses the plurality of selected transmitting antennas to transmit a radio signal.