PROBLEM TO BE SOLVED: To easily select a frame of an elastic image in a good pressed state based on a plurality of types of feature amounts. SOLUTION: An ultrasonic diagnostic apparatus 100 applies pressure to an object by an ultrasonic probe 2 which transmits and receives ultrasonic waves, transmits and receives ultrasonic waves to and from the object of the object, and measures hardness of the object. The ultrasonic diagnostic apparatus 100 includes a transmitter 12 that transmits a drive signal to the ultrasonic probe 2, a receiver 13 that processes a received signal output from the ultrasonic probe 2, and a processed received signal. Based on the feature amount calculation unit 17 that calculates a plurality of types of feature amount indicating the pressed state for each frame of the elasticity image, and an evaluation value is calculated from the calculated plurality of feature amounts, based on the evaluation value, An evaluation value calculation unit 18 that generates information about a stable section including a frame in a good pressed state and a display image generation unit 19 that displays information about the generated stable section on the display unit 20 are provided. [Selection diagram] Figure 2【課題】複数の種類の特徴量に基づいて押圧状態が良好な弾性画像のフレームを簡便に選択できるようにする。【解決手段】超音波診断装置１００は、超音波を送受信する超音波探触子２により被検体に圧迫を加え被検体の対象に超音波を送受信し対象の硬さを測定する。超音波診断装置１００は、超音波探触子２に駆動信号を送信する送信部１２と、超音波探触子２から出力された受信信号を処理する受信部１３と、処理された受信信号に基づいて、弾性画像のフレーム毎の押圧状態を示す複数の種類の特徴量を算出する特徴量算出部１７と、算出された複数の特徴量から評価値を算出し、当該評価値に基づいて、押圧状態が良好なフレームからなる安定区間の情報を生成する評価値算出部１８と、生成された安定区間の情報を表示部２０に表示する表示画像生成部１９と、を備える。【選択図】図２
