PROBLEM TO BE SOLVED: To provide a new technique for reducing a computing amount at the time of blood pressure measurement.SOLUTION: An ultrasonic blood pressure measuring instrument 10 comprises: an ultrasonic probe 104 transmitting an ultrasonic wave with respect to a blood vessel and receiving a reflection wave a storage section 500 storing LUT data 512 determining a relation between reception characteristics of the reflection wave of the ultrasonic wave transmitted with respect to the blood vessel and a blood pressure and a blood pressure measurement execution section 230 referring to the LUT data 512 and determining the blood pressure on the basis of a reception signal of the reflection wave.SELECTED DRAWING: Figure 6COPYRIGHT: (C)2016,JPO&INPIT【課題】血圧計測時の演算量を低減させる新たな技術を提供すること。【解決手段】超音波血圧計測装置10は、血管に対して超音波を送信し、反射波を受信する超音波プローブ104と、前記血管に対して送信した超音波の反射波の受信特性と前記血圧との関係を定めたLUTデータ512を記憶する記憶部500と、前記反射波の受信信号に基づき、前記LUTデータ512を参照して血圧を決定する血圧計測実行部230とを備えている。【選択図】図6