An ultrasonic diagnostic apparatus according to the present invention includes: a transmitting and receiving section, which drives a probe repeatedly to send out ultrasonic waves toward a subject and which makes the probe receive reflected echoes produced by having the ultrasonic waves reflected by the subject, thereby generating received signals a color flow mapping signal processing section for sequentially generating, based on the received signals, blood flow velocity data about a portion of each frame representing the blood flow of the subject a persistence processing section for performing persistence processing on the blood flow velocity data of each frame a tomographic image signal processing section for generating B-mode tomographic image frame data based on the received signals and an image synthesizing section for synthesizing together the persistence-processed blood flow velocity data and the B-mode tomographic image frame data. The persistence processing section makes an aliasing decision based on the blood flow velocity data of the current frame and the persistence-processed blood flow velocity data of an earlier frame that precedes the current frame, and changes a persistence coefficient dynamically according to a result of the aliasing decision and based on those blood flow velocity data of the current and earlier frames.
