To provide a radio base station and a radio communication method more immune to velocity/fading fully utilizing a characteristic of a time slot pair allocated to each radio communication terminal.

A radio base station, comprising a plurality of antennas, to perform radio communication with a radio communication terminal using a time division multiple access/time division duplex system, detects a value to indicate a propagation path variation in the radio communication terminal and allocates to the radio communication terminal one of a plurality of time slot pairs different from one another in a time interval between an up time slot and a down time slot contained in one frame according to the value to indicate the propagation path variation.