PROBLEM TO BE SOLVED: To provide an ultrasonic probe, an ultrasonic diagnostic device, and a method of manufacturing the ultrasonic probe that can restrain characteristic variations of ultrasonic waves transmitted and received by a plurality of piezoelectric elements.SOLUTION: An ultrasonic probe (20) including a plurality of piezoelectric elements (201) for each transmitting and receiving ultrasonic waves includes: a piezoelectric body (23) at least one layer of acoustic matching layer (24a and 24b) provided on the piezoelectric body and a filler (26) that has filled a groove (25) formed from an outermost surface at an opposite side to the piezoelectric body side of the at least one layer of acoustic matching layer to the inside of the piezoelectric body so as to divide the piezoelectric body into divisions corresponding to the respective piezoelectric elements. The arithmetic average roughness of the outermost surface of the at least one layer of acoustic matching layer is 0.4 μm or less.SELECTED DRAWING: Figure 3COPYRIGHT: (C)2018,JPO&INPIT【課題】複数の圧電素子により送受信される超音波の特性ばらつきを抑えることができる超音波探触子、超音波診断装置及び超音波探触子の製造方法を提供する。【解決手段】超音波の送受信を各々行う複数の圧電素子(201)を備えた超音波探触子(20)は、圧電体(23)と、圧電体上に設けられた少なくとも一層の音響整合層(24a,24b)と、少なくとも一層の音響整合層の圧電体側とは反対側の最表面から圧電体の内部に亘って、圧電体を複数の圧電素子の各々に対応する部分に分けるように形成されている溝部(25)に充填された充填剤(26)と、を備え、少なくとも一層の音響整合層における最表面の算術平均粗さは、0.4μm以下である。【選択図】図3
