PROBLEM TO BE SOLVED: To provide a method and a measuring device for grasping the behavior of an ultrasonic wave in a mode different from that of a reflected image. SOLUTION: An ultrasonic probe having an irradiation vibration element group having three or more vibration elements and a reception vibration element group having a plurality of vibration elements is transferred from an irradiation vibration element group to a reception vibration element group. The ultrasonic probe is brought into contact with the measurement target so as to pass through the inside of the measurement target, and the vibration elements of the irradiation vibration element group are sequentially irradiated with ultrasonic waves into the inside of the measurement target. The ultrasonic waves transmitted through the object to be measured are received by the vibrating elements of the receiving vibrating element group as received data for each irradiated vibrating element, and the aperture synthesis method is applied based on the received data to measure the object to be measured. A method and device for measuring ultrasonic waves of an object to be measured, which calculates the intensity attenuation of ultrasonic waves and the propagation speed of ultrasonic waves at each position inside the object. [Selection diagram] Fig. 1【課題】反射像とは異なるモードの超音波への挙動を把握する方法および測定装置の提供。【解決手段】３つ以上の振動素子を有する照射用振動素子群と、複数の振動素子を有する受信用振動素子群と、を有する超音波プローブを、照射用振動素子群から受信用振動素子群へと測定対象物の内部を通過するように、前記超音波プローブを測定対象物に当接させ、照射用振動素子群の振動素子を順々に超音波を測定対象物の内部に照射し、測定対象物を透過した超音波を、照射した振動素子ごとに各々の受信データとして受信用振動素子群の振動素子にそれぞれ受信させ、受信データに基づいて開口合成法を適用することにより、測定対象物の内部の各位置における超音波の強度減衰と超音波の伝播速度とを算出する、測定対象物の超音波測定方法方法及び装置。【選択図】図１
