The ultrasonic diagnostic apparatus of the present invention comprises an operation panel 11 through which different diagnostic conditions are set, a system controller 12 for controlling the frequency of the ultrasonic wave to be transmitted according to the field of view, a transmitting circuit 13 for transmitting ultrasonic wave, a receiving circuit 15 for receiving the reflected wave from an ultrasonic probe 14 to convert the reflected wave into an electric signal, an image processing unit 16 for applying the predetermined processing to the signal from the receiving circuit 15 and a display unit 17 for displaying tomographic image on the basis of the electric signal from the image processing apparatus 16.
