An ultrasound diagnostic device that transmits a push pulse in order to detect shear waves, including a push pulse transmitter, a displacement detector, an evaluator, and a push pulse adjuster. The push pulse transmitter transmits the push pulse based on a transmission profile. The displacement detector repeatedly transmits ultrasound into the subject after the push pulse, receives reflected ultrasound from the subject that corresponds to transmitted ultrasound, and detects displacement due to shear waves caused by the push pulse. The evaluator evaluates shear wave propagation based on detected displacement. The push pulse adjuster adjusts the transmission profile based on evaluation results. When the transmission profile is adjusted, the push pulse transmitter transmits a second push pulse based on the adjusted transmission profile and the displacement detector detects displacement caused by the second push pulse.
