An ultrasonic diagnostic device according to an embodiment includes transmission and reception circuitry and processing circuitry. The transmission and reception circuitry repeatedly executes first scanning in which a subject is scanned along a plurality of scanning lines. The processing circuitry controls generating a color Doppler image based on reflected wave data collected through the first scanning. The processing circuitry controls obtaining a wait time of the first scanning based on a repetition period of the first scanning and a required time of the first scanning. The transmission and reception circuitry executes second scanning different from the first scanning during the wait time obtained by the processing circuitry.
