The present invention makes it possible to measure elasticity in a wider range within a subject while ensuring image quality such as S / N. An ultrasonic diagnostic apparatus for detecting a propagation speed of a shear wave, which sequentially applies a plurality of push waves focused on a plurality of transmission focal points arranged in a depth direction in a subject on a plurality of transmission transducers. Push wave pulse transmission unit that performs transmission of the push wave train to be transmitted a plurality of times with different positions in the row direction of the plurality of transmission focal points, and the positions of the transmission focal points of the plurality of push waves that constitute the plurality of push wave trains And a region setting unit that determines a measurement target region based on the transmission order of a plurality of push waves, and the push wave pulse transmission unit is a shallow part of the subject in transmitting two push wave trains adjacent in the row direction. The push wave train is transmitted by transmitting a plurality of push waves in a different transmission order from either the transmission order from the deep to the deep part or the transmission order from the deep part to the shallow part. [Selection] Figure 4【課題】Ｓ／Ｎ等の画像品質を確保しつつ、被検体内のより広い範囲における弾性計測を可能にする。【解決手段】せん断波の伝播速度を検出する超音波診断装置であって、複数の送信振動子に被検体内の深さ方向に並んだ複数の送信焦点それぞれに集束する複数のプッシュ波を順次送信させるプッシュ波列の送信を、複数の送信焦点の列方向の位置を異ならせて複数回実施するプッシュ波パルス送信部と、複数のプッシュ波列を構成する複数のプッシュ波の送信焦点の位置と、複数のプッシュ波の送信順序とに基づき計測対象領域を決定する領域設定部を備え、プッシュ波パルス送信部は、列方向に隣接する２つのプッシュ波列の送信において、被検体の浅部から深部に向けた送信順序又は深部から浅部に向けた送信順序の何れかのうち、互いに異なる送信順序で複数のプッシュ波を送信してプッシュ波列の送信を実施する。【選択図】図４
