A radio communication method utilizing MU-MIMO undergoing an overlap cell environment due to spatial multiplexing transmission for use in a radio communication system including a plurality of cells configured of radio networks, connecting radio base stations (AP1, AP2) and radio terminal stations (STA1, STA2, STA3) for receiving and transmitting packet signals, in which radio base stations each using a plurality of antennas are able to simultaneously receive and transmit packet signals with radio terminal stations via spatial multiplexing, the radio communication method being characterized in that it comprises: within a radio base station belonging to a first cell among the plurality of cells, upon receiving a packet signal transmitted from a radio base station or a radio terminal station of a peripheral cell, storing a transmission source address included in the packet signal; within the radio base station of the first cell transmitting a packet signal, performing carrier sense, and then upon detecting an idling state not receiving radio signals, transmitting a call signal including a destination address of the packet signal addresses of the radio base station and the radio terminal station of the peripheral cell; within the radio terminal stations (STA1, STA2) of the first cell, the radio base station and the radio terminal station of the peripheral cell, each of which is specified by the call signal, sending back a response signal; and within the radio base station of the first cell receiving the response signal, performing channel estimation with respect to the radio terminal stations (STA1, STA2) of the first cell, the radio base station and the radio terminal station of the peripheral cell, based on the channel estimation result, generating a null point, relative to an antenna directivity, directing to the radio base station and the radio terminal station of the peripheral cell, thus performing spatial multiplexing transmission to transmit the packet signal to the radio terminal stations (STA1, STA2) of the first cell. within a radio base station belonging to a first cell among the plurality of cells, upon receiving a packet signal transmitted from a radio base station or a radio terminal station of a peripheral cell, storing a transmission source address included in the packet signal; within the radio base station of the first cell transmitting a packet signal, performing carrier sense, and then upon detecting an idling state not receiving radio signals, transmitting a call signal including a destination address of the packet signal addresses of the radio base station and the radio terminal station of the peripheral cell; within the radio terminal stations (STA1, STA2) of the first cell, the radio base station and the radio terminal station of the peripheral cell, each of which is specified by the call signal, sending back a response signal; and within the radio base station of the first cell receiving the response signal, performing channel estimation with respect to the radio terminal stations (STA1, STA2) of the first cell, the radio base station and the radio terminal station of the peripheral cell, based on the channel estimation result, generating a null point, relative to an antenna directivity, directing to the radio base station and the radio terminal station of the peripheral cell, thus performing spatial multiplexing transmission to transmit the packet signal to the radio terminal stations (STA1, STA2) of the first cell.