The ultrasonic diagnostic picture formation system transmits the beam where plural was focused vertically to the plane surface of the aperture of transducer, receives the many reception line according to the beam which was transmitted respectively. The sub aperture of the aperture of transducer is defined by apodeizeshiyon, the signal of the sub aperture is connected, the alignment and forms the signal which shows the action of the transmission steering wheel with the angle which differs in regard to the sub aperture. The signal which the steering wheel is done is detected, the signal which is detected in regard to the common point in picture field is connected. Was connected the signal which is detected is used in order to form the ultrasonic picture which has the speckle which is decreased.
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