An ultrasonic diagnostic apparatus according to the present invention comprises a plurality of transducer units which are two-dimensionally arranged to transmit/receive an ultrasonic wave (40) to/from hard tissue a transceiver unit (12) which receives an echo signal for each transducer unit from the plurality of transducer units a surface point specifying unit which specifies a surface point corresponding to a surface of the hard tissue for each echo signal and a form data generator unit which generates form data of hard tissue surface on the basis of a plurality of surface points obtained two-dimensionally from the echo signals of the plurality of transducer units.
