When a tomographic image is displayed, the operator of an ultrasonic diagnostic apparatus is allowed to know the timing to optimize the image quality and decide by him- or herself whether optimization needs to be done now or not.The ultrasonic diagnostic apparatus includes: an ultrasonic probe for sending out an ultrasonic wave toward a vital tissue and receiving a reflected wave of the ultrasonic wave reflected from the tissue an image constructing section for constructing an image frame representing a tomographic image of the tissue by calculating the magnitudes of displacements at multiple measuring sites on the tissue based on the reflected wave a display section for displaying the image frame thereon and a processing section for analyzing an image feature quantity of the image frame and comparing the image feature quantity to a predetermined reference feature quantity. Based on a result of the comparison, the apparatus gives a notification that it is time to decide whether its operator wants the image quality of the image frame to be optimized now or not.
