Embodiments of the present disclosure relate to an ultrasonic diagnostic apparatus and a control method thereof to perform a leg vein examination more easily, and a control method thereof.An ultrasonic diagnostic apparatus includes: an ultrasonic probe configured to acquire a color Doppler image； a controller configured to determine a presence or absence of backflow of blood and a time of backflow based on the acquired color Doppler image； and a display configured to display an examination result with the color Doppler image.
