1. An ultrasonic diagnostic apparatus comprising, an ultrasonic probe for transmitting an ultrasonic wave to and receiving an ultrasonic wave from a test object, an elasticity data configuration means for obtaining elasticity data regarding the test object, based on a received signal of the ultrasonic probe, an image generation means for generating an elastic image showing a distribution of the elasticity data of the test object, and a display mode setting means for setting a display mode of the elastic image, in order that a different tissue becomes identifiable based on a value of the elasticity data, wherein, the display mode setting means sets different display modes within one tissue, corresponding to the value of the elasticity data thereof.