As for the ultrasonic diagnostic device of this invention, measuring the displacement of organization of the fault region on the basis of the reflected echo signal which is measured with the ultrasonic probe and the ultrasonic probe which the ultra wave sending and receiving are done forms the RF signal frame data of the fault region of the suffering inspection body on the basis of the phasing addition expedient and the RF signal frame data of the pair which where acquisition time differs with the suffering inspection bodies, calculating the elastic information which displays the hardness or softness of organization of the fault region, on the basis of the displacement measurement expedient which forms the displacement frame data and the displacement frame data which is formed elastic information operational expedient and the elastic frame which form the elastic frame dataIt has with elastic picture constitution expedient and the picture indicator which indicates the elastic picture and the elastic picture is housed the memory which form the elastic picture on the basis of the data.本発明の超音波診断装置は、被検体との間で超音波を送受信する超音波探触子と、超音波探触子で計測された反射エコー信号に基づいて被検体の断層部位のRF信号フレームデータを生成する整相加算手段と、取得時刻の異なる一対のRF信号フレームデータに基づいて断層部位の組織の変位を計測して変位フレームデータを生成する変位計測手段と、生成された変位フレームデータに基づいて断層部位の組織の硬さ又は軟らかさを表す弾性情報を演算して弾性フレームデータを生成する弾性情報演算手段と、弾性フレームデータに基づいて弾性画像を生成する弾性画像構成手段と、弾性画像を表示する画像表示器と、弾性画像が格納されるメモリとを備える。
