In an ultrasonic diagnosis device, while a signal component is preserved, a factor of degrading image quality such as a flicker of a noise is suppressed. An input image is separated into a signal component image and a noise component image. After frame synthesis processing is performed on the noise component image, the signal component image is synthesized with the noise component image having undergone the frame synthesis. Thus, the noise is suppressed. Otherwise, after the input image is separated into the signal component image and noise component image, the frame synthesis processing is performed on the signal component image. The noise component image is then synthesized with the signal component image having undergone the frame synthesis. Thus, discernment of a signal can be improved.
