To provide an ultrasonic diagnostic apparatus and an ultrasonic diagnostic method capable of conducting an ultrasonic diagnosis using acoustic radiation pressure, without causing an increase in the temperature of an ultrasound-exposed portion. A push pulse transmitter 5 outputs a coded pressurization pulse signal. A track pulse transmitter 7 outputs a measurement pulse signal for measurement. An ultrasound probe 3 outputs an ultrasonic wave for generating a shear wave in a target object on the basis of the pressurization pulse signal, and an ultrasonic wave for measurement on the basis of the measurement pulse signal. An echo receiver 8 receives an echo of the ultrasonic wave for measurement, and outputs an electric signal. An elastic modulus estimator decodes the electric signal output by the echo receiver, and estimates an elastic modulus of the target object on the basis of the decoded signal.
