An ultrasonic diagnostic apparatus includes an ultrasonic signal processing circuit including: a transmitter that selects a transmission transducer column from a plurality of transducers and transmits an ultrasonic beam to a target region a receiver that generates a sequence of reception signals a first phasing adder that generates a first acoustic beam signal by performing phasing addition on the sequence of reception signals a parameter calculator that calculates a parameter for generating a subframe acoustic beam signal a second phasing adder that generates a subframe acoustic beam signal a synthesizer that generates a frame acoustic beam signal a controller that determines whether to generate an ultrasonic image based on any one of the first acoustic beam signal and the frame acoustic beam signal and an ultrasonic image generator that generates the ultrasonic image from any one of the first acoustic beam signal and the frame acoustic beam signal.
