The present invention aims at providing an ultrasonic diagnostic apparatus capable of acquiring more accurate tissue character values such as strain, an average elastic modulus, and an average viscosity.The ultrasonic diagnostic apparatus of the present invention detects tissue boundaries of a subject in accordance with a received signal based on an ultrasonic echo from a receiving section 103, by means of a boundary detection section 110; and tracks motions of the tissue boundaries of the subject by means of a tissue tracking section 108. A tissue character value computing section 109 computes tissue character values of the subject from the motions of the tissue boundaries of the subject tracked by the tissue tracking section 108 and a blood pressure value of the subject acquired from a blood pressure value acquisition section 112.