An ultrasonic diagnostic device includes transmission circuitry, reception circuitry, and signal processing circuitry. The transmission circuitry causes an ultrasonic probe including a plurality of elements to transmit plane waves at a plurality of different deflection angles. The reception circuitry generates reception signal groups based on reflection waves that the individual elements included in the probe receive in response to the transmission of the plane waves. The signal processing circuitry acquires a plurality of complex images corresponding to the respective deflection angles and estimates wavefront distortion at the time of transmission using the complex pixel values of the complex images, and performs correction processing on the reception signal groups based on the wavefront distortion at the time of the transmission to generate image data based on the complex pixel values of the complex images for the respective deflection angles that are acquired from the reception signal groups after the correction processing.
