A wireless communication apparatus comprising: a designation unit which generates format designation information for designating a format of transmission and reception for another wireless communication apparatus ; a first transmission unit (3103-1 to 3103-N) which wirelessly transmits the format designation information to the other wireless communication apparatus; an acquisition unit (3104-1 to 3104-N) which acquires a packet; a propagation channel estimation unit which estimates uplink propagation channel information indicating a propagation channel from the other wireless communication apparatus to the wireless communication apparatus based on a response confirmation signal included in the packet; a calibration coefficient calculation unit which calculates a calibration coefficient based on downlink propagation channel information indicating a propagation channel from the wireless communication apparatus to the other wireless communication apparatus and the uplink propagation channel information; a transmission weight value calculation unit which calculates a transmission weight value based on the calibration coefficient and the uplink propagation channel information; and a second transmission unit (3103-1 to 3103-N) which wirelessly transmits a predetermined signal to the other wireless communication apparatus by performing transmit beamforming based on the transmission weight value, wherein the designation unit performs designation so that the response confirmation signal for dealing with estimation of the uplink propagation channel information corresponding to a band that is necessary for the wireless communication apparatus to perform the transmit beamforming in multiuser multiple input multiple output (MU-MIMO) transmission is allocated and transmitted over the entire band. a designation unit which generates format designation information for designating a format of transmission and reception for another wireless communication apparatus ; a first transmission unit (3103-1 to 3103-N) which wirelessly transmits the format designation information to the other wireless communication apparatus; an acquisition unit (3104-1 to 3104-N) which acquires a packet; a propagation channel estimation unit which estimates uplink propagation channel information indicating a propagation channel from the other wireless communication apparatus to the wireless communication apparatus based on a response confirmation signal included in the packet; a calibration coefficient calculation unit which calculates a calibration coefficient based on downlink propagation channel information indicating a propagation channel from the wireless communication apparatus to the other wireless communication apparatus and the uplink propagation channel information; a transmission weight value calculation unit which calculates a transmission weight value based on the calibration coefficient and the uplink propagation channel information; and a second transmission unit (3103-1 to 3103-N) which wirelessly transmits a predetermined signal to the other wireless communication apparatus by performing transmit beamforming based on the transmission weight value, wherein the designation unit performs designation so that the response confirmation signal for dealing with estimation of the uplink propagation channel information corresponding to a band that is necessary for the wireless communication apparatus to perform the transmit beamforming in multiuser multiple input multiple output (MU-MIMO) transmission is allocated and transmitted over the entire band. <EOS>