1. An ultrasonic diagnostic apparatus comprising: an ultrasonic probe configured to transmit an ultrasonic wave to, and receive an ultrasonic wave from, a test object, a computer including at least one processor, to effect operations including: obtaining elasticity data regarding the test object, based on a received signal of the ultrasonic probe, generating an elastic image showing a distribution of the elasticity data of the test object, setting a display mode of the elastic image, in order that different types of tissue of the test object becomes individually identifiable based on a value of the elasticity data, identifying predetermined degeneration types within one tissue type according to the value of the elasticity data, and setting different display modes corresponding to the degeneration types with one tissue type, and separating as a different elasticity data range, an area where the elasticity data ranges corresponding to at least two degeneration types are overlapping elasticity data ranges, and imparting different color information to the area.