1. An ultrasonic diagnostic apparatus transmitting an ultrasound signal to a diagnosis target and receiving a reflected ultrasound signal from the diagnosis target to generate an ultrasound image, wherein an ultrasound image to be displayed on a screen is divided into plural division regions, and filtering is performed for the respective division regions based on blood-flow information at plural division positions on the diagnosis target corresponding to the respective division regions to provide the filtered result as the ultrasound image.