PROBLEM TO BE SOLVED: To provide an ultrasonic probe capable of acquiring an ultrasonic image with high resolution of a transmission and reception waveform.SOLUTION: An ultrasonic probe 2 comprises: a piezoelectric substance 22 for transmitting and receiving an ultrasonic wave at least two layers of first acoustic matching layers 23 provided on the front surface of the piezoelectric substance 22 a protective layer 25 provided on the front surface of a layer located at the foremost position of the first acoustic matching layers 23 at least one or more layers of second acoustic matching layers 26 provided on the front surface of the protective layer 25 and an acoustic lens 27 provided on the front surface of a layer located at the foremost position of the second acoustic matching layers 26. Acoustic impedance of the second acoustic matching layers 26 is lower than that of the protective layer 25, and is higher than that of the acoustic lens 27.COPYRIGHT: (C)2015,JPO&INPIT【課題】送受信波形の分解能の高い超音波画像が得られる超音波探触子を提供する。【解決手段】超音波探触子2は、超音波を送受信する圧電体22と、圧電体22の前面に設けられる少なくとも2層以上の第一音響整合層23と、第一音響整合層23のうち最も前側に位置する層の前面に設けられる保護層25と、保護層25の前面に設けられる少なくとも1層以上の第二音響整合層26と、第二音響整合層26のうち最も前側に位置する層の前面に設けられる音響レンズ27と、を備え、第二音響整合層26は、保護層25よりも音響インピーダンスが低く、音響レンズ27よりも音響インピーダンスが高い。【選択図】図3
