An object information acquiring apparatus is provided that includes: a plurality of receiving elements which receive an acoustic wave that propagates from an object, and which convert the acoustic wave to a reception signal； an adaptive beamformer that performs adaptive beamforming of adjusting reception directionality in accordance with the reception signal in use of the reception signal； a delay-and-sum beamformer that performs delay-and-sum beamforming having preset directionality in use of the reception signal； an amplitude modulator that uses one output signal of one of the adaptive beamformer and the delay-and-sum beamformer, to perform amplitude modulation on an output signal of the other one of the beamformers； and a generator that, on the basis of a signal outputted by the amplitude modulator, generates image data on the interior of the object.
