Identification of the position of the measurement object by the ultrasonic wave transmission and reception, and to provide an ultrasonic diagnostic apparatus capable of detecting a dynamic response. An ultrasonic probe for transmitting and receiving echo signals from within the object, differences in acoustic impedance performs a switching switch switches the transmission and reception of the respective elements of the ultrasonic probe, a first ultrasonic wave transmission and reception with respect to the object and reception with the first ultrasonic wave transmitting and receiving unit for detecting a displacement generation unit for displacing the tissue emits a displacement generating focused beam in the object, echo signals from the object performs a second ultrasonic transmitting and receiving a displacement detector that detects a shear wave displacement caused by the focused beam generated displacement at a plurality of positions, a central control unit for controlling the displacement generator and the displacement detector, and the ultrasonic tomographic image indicating the difference in acoustic impedance and displayed superimposed shear wave displacement map showing a shear wave displacement and a display unit, muscles, tendons, and ligaments, and the like are highlighted linearly to the ultrasonic tomographic image.超音波送受信によって測定対象物の位置の同定,および,力学応答を検出することが可能な超音波診断装置を提供する。対象物内からのエコー信号を送受信する超音波探触子と,超音波探触子の各素子の送受信を切替える切替えスイッチと,対象物内に対して第一超音波送受信を行い音響インピーダンスの違いを検出する第一超音波送受信部と,対象物内に変位生成用集束ビームを放射して組織を変位させる変位生成部と,第二超音波送受信を行い対象物からのエコー信号を受波し,変位生成用集束ビームにより生じるずり波変位を複数の位置で検出する変位検出部と,変位生成部と変位検出部とを制御する中央制御部と,音響インピーダンスの違いを示す超音波断層像とずり波変位を示すずり波変位マップを重畳して表示し表示部を有し,筋肉・腱・靭帯等が超音波断層像に線状に強調表示される。
