Elastic image display method and ultrasonic diagnostic apparatus

Elastic image display method of the present invention, the while applying compression to the subject 1 by measuring the ultrasonic tomographic data of the tomographic site of the subject (2,3,4), the tomographic site based on the ultrasonic tomographic data calculated (6) the strain of the tissue in, the generated elastic image in the tomographic site displayed on the display device 11 (7), a plurality of ROI on the elastic image displayed on the display device based on the strain set, the aforementioned index digitizing the distortion in each ROI (12), (8) by displaying the index value on the display device, it was quantitatively evaluable the hardness of the biological tissue of diagnostic region the features.