A sectional image and a two-dimensional elasticity image on an arbitrary cross section are added at a first combination ratio received from an operator to produce an arbitrary cross-section combined image. A three-dimensional image and a three-dimensional elasticity image of a predetermined part are added at a second combination ratio received from the operator to produce a three-dimensional combined image. The arbitrary cross-section combined image and the three-dimensional combined image are displayed side by side in a display. This can provide an ultrasonic diagnostic apparatus capable of facilitating the grasp of the structure and the recognition of the hardness of the living organ within the object from the plurality of images.
