Disclosed are an ultrasonic diagnostic apparatus and an ultrasonic measurement method enabling easy acquisition of elasticity information by means of a shear wave.The ultrasonic diagnostic apparatus is provided with an ultrasonic probe (4) configured to transmit/receive an ultrasonic wave to/from an object (5), a vibrator (3) configured to generate a shear wave, a transmission/reception units (2,6) configured to transmit/receive an ultrasonic wave to/from the ultrasonic probe (4), a shear wave propagation detecting unit (14) for determining the propagation position of the shear wave and the propagation time of the shear wave, a shear wave image constructing unit (16) configured to construct a shear wave image showing the relation between the propagation position and propagation time of the shear wave, and an elasticity information calculating unit (15) configured to calculate elasticity information based on the boundary of the shear wave image.
