An ultrasound diagnostic apparatus comprising: an ultrasound probe that is adapted to transmit an ultrasound push wave to generate a shear wave in a subject, and that is adapted to transmit an ultrasound tracking wave to the subject; a shear wave measurement unit that is adapted to obtain a measurement value array including a measurement value at each depth of a plurality of depths within the subject by measuring the shear wave based on a reception signal obtained by transmitting the tracking wave; and a measurement value processor that is adapted to identify a measurement value which satisfies a discard condition from among a plurality of the measurement value arrays obtained by executing the measurement of the shear wave a plurality of times, characterised in that the ultrasound diagnostic apparatus further comprises a detector that is adapted to detect a fluctuation which is a periodic displacement of a tissue in the subject, based on the reception signal, the discard condition includes a condition to discard a measurement value of each depth at which the fluctuation is detected, the measurement value processor is adapted to discard the measurement value of each depth in which the fluctuation is detected, from among the plurality of measurement values of the plurality of measurement value arrays, the discard condition includes a condition to discard a propagation velocity measurement value which is either negative or outside of a threshold range, and the measurement value processor is adapted to discard the propagation velocity measurement value which is either negative or outside of the threshold range, from among the plurality of measurement values of the plurality of measurement value arrays. an ultrasound probe that is adapted to transmit an ultrasound push wave to generate a shear wave in a subject, and that is adapted to transmit an ultrasound tracking wave to the subject; a shear wave measurement unit that is adapted to obtain a measurement value array including a measurement value at each depth of a plurality of depths within the subject by measuring the shear wave based on a reception signal obtained by transmitting the tracking wave; and a measurement value processor that is adapted to identify a measurement value which satisfies a discard condition from among a plurality of the measurement value arrays obtained by executing the measurement of the shear wave a plurality of times, characterised in that the ultrasound diagnostic apparatus further comprises a detector that is adapted to detect a fluctuation which is a periodic displacement of a tissue in the subject, based on the reception signal, the discard condition includes a condition to discard a measurement value of each depth at which the fluctuation is detected, the measurement value processor is adapted to discard the measurement value of each depth in which the fluctuation is detected, from among the plurality of measurement values of the plurality of measurement value arrays, the discard condition includes a condition to discard a propagation velocity measurement value which is either negative or outside of a threshold range, and the measurement value processor is adapted to discard the propagation velocity measurement value which is either negative or outside of the threshold range, from among the plurality of measurement values of the plurality of measurement value arrays.