PROBLEM TO BE SOLVED: To provide an ultrasound probe by which an ultrasound image of high quality can be obtained.SOLUTION: When td refers to a layer thickness of an acoustic reflecting layer 23, tp refers to a layer thickness of a piezoelectric device 24, tm(1), tm(2), ..., tm(n), respectively, refer to layer thicknesses of acoustic matching layers 25 for a first to n-th layer, counting from the piezoelectric device 24, λcd refers to a wavelength of ultrasound, with a center frequency fc of a transmission and reception band of an ultrasound probe 2, which the ultrasound transmit inside the acoustic reflecting layer 23, λcp refers to a wavelength of the ultrasound with the frequency fc that transmit inside the piezoelectric device 24, and λcm(1), λcm(2), ..., λcm(n), respectively, refer to wavelengths of the ultrasound with the frequency fc that transmit inside the acoustic matching layers 25 for the first to the n-th layer, counting from the piezoelectric device 24, the following formula (1) is satisfied.COPYRIGHT: (C)2015,JPO&INPIT【課題】高画質な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】音響反射層23の層厚をtd、圧電素子24の層厚をtp、及び圧電素子24側から数えて1層目~n層目の音響整合層25の層厚をそれぞれtm(1)、tm(2)、・・・、tm(n)とし、音響反射層23内を伝播する、当該超音波探触子2の送受信帯域の中心周波数fcの超音波の波長をλcd、圧電素子24内を伝播する周波数fcの超音波の波長をλcp、及び圧電素子24側から数えて1層目~n層目の音響整合層25内を伝播する周波数fcの超音波の波長をそれぞれλcm(1)、λcm(2)、・・・、λcm(n)としたとき、下記式(1)を満たす。【選択図】図3
