PROBLEM TO BE SOLVED: To provide an ultrasonic probe reducing noise even when an another layer is interposed between a piezoelectric element receiving ultrasonic waves coming from an inspection object and an acoustic damping member, and also to provide an ultrasonic diagnostic device.SOLUTION: This ultrasonic probe 2 is equipped with: a first piezoelectric part 23 having a piezoelectric element formed by having a piezoelectric material, and mutually converting a signal between an electric signal and an ultrasonic signal by using a piezoelectric phenomenon an acoustic damping member 21 formed of a material absorbing ultrasonic waves and a second piezoelectric part 22 arranged between the first piezoelectric part 23 and the acoustic damping member 21, provided with a plurality of grooves different in width along a sound axis direction, and having a piezoelectric element formed by having a piezoelectric material, and mutually converting a signal between an electric signal and an ultrasonic signal by using a piezoelectric phenomenon.COPYRIGHT: (C)2011,JPO&INPIT【課題】本発明は、被検体から来た超音波を受信する圧電素子と音響制動部材との間に他の層が介在する場合でもノイズを低減することができる超音波探触子および超音波診断装置を提供する。【解決手段】本発明の超音波探触子2は、圧電材料を備えて成り、圧電現象を利用することによって電気信号と超音波信号との間で相互に信号を変換することができる圧電素子を備える第1圧電部23と、超音波を吸収する材料から構成される音響制動部材21と、第1圧電部23と音響制動部材21との間に配置され、音軸方向に沿って幅が異なる複数の溝を形成した、圧電材料を備えて成り、圧電現象を利用することによって電気信号と超音波信号との間で相互に信号を変換することができる圧電素子を備える第2圧電部22を備える。【選択図】図3
