An ultrasonic diagnostic apparatus includes an image generating unit, an acquiring unit, an extracting unit, a flap identifying unit, a first synthesizing unit, an alignment processing unit and a second synthesizing unit. The image generating unit generates an echocardiographic image including an aorta. The acquiring unit acquires a heart area image including the aorta. The extracting unit extracts an artery region based on the heart area image. The flap identifying unit identifies a flap region based on the artery region. The first synthesizing unit synthesizes information on the flap region onto the artery region to generate a first synthesized image. The alignment processing unit performs processing to align an imaging region in the echocardiography on the heart area image based on a positional data signal. The second synthesizing unit synthesizes information that indicates the imaging region processed for alignment onto the first synthesized image to generate a second synthesized image.
