To provide an adaptive array antenna in which interference by interference waves can be surely excluded.

By weighing received signals S1A-S1N to maximize a gain in the arriving direction of interference waves, a first synthetic received signal S11 mixing the interference wave and the component of a desired wave is generated and by weighing the received signals to maximize a gain in the arriving direction of the interference wave and to turn a null to the arriving direction of the desired wave, a second synthetic received signal S15 containing only the interference wave is generated. Further, by canceling a component correlative with the second synthetic received signal S15 from the first synthetic received signal S11, the interference of the interference waves is excluded and only the desired wave can be surely received.