To carry out objective or definitive diagnosis on the basis of an elastic image regardless of experience and proficiency, a method of displaying an elastic image includes the steps of measuring ultrasound cross-section data of a cross-section region of a subject by applying pressuring to the subject, determining a physical value correlating with the elasticity of tissue in the cross-section region on the basis of the ultrasound cross-section data, generating an elastic image of the cross-section region on the basis of the physical value and displaying the elastic image on a display device, determine compression state information relating to the compression state of the cross-section region on the basis of the pressure applied to the subject, and displaying the compression state information together with the elastic image on the display device.
