PROBLEM TO BE SOLVED: To solve such a problem that, when a plurality of transducers each having a rectangular receiving surface on a recessed support part having a quadric surface of revolution, if the transducers are disposed with their vertices of outer edges of the receiving surfaces brought close to each other, a spacial frequency of a transducer arrangement space is reduced, and resolution power of an acoustic wave image is limited.SOLUTION: The transducer array includes: a support part, the inner surface of which is defined by a quadric surface of revolution formed according to an imaginary quadratic curve rotating about an imaginary rotation axis and having a plurality of openings； and a plurality of transducers each of which includes a receiving surface having a substantially parallelogram shape so as to be fitted in the opening. The receiving surface is arranged in the transducer array such that any one of the four vertices is closer to the imaginary rotation axis than the other three vertices.SELECTED DRAWING: Figure 1【課題】 矩形の受信面を有する探触子を回転二次曲面を有する凹状の支持部に複数配置する際、受信面の外縁の頂点同志が近接した状態で配置してしまうと、探触子配置の空間周波数が低下し音響波画像の分解能が制限されてしまうという課題があった。【解決手段】 仮想回転軸の周りに仮想二次曲線が回転した回転二次曲面により内面が規定され、複数の開口を備えた支持部と、それぞれの受信面が開口に適合するように略平行四辺形の受信面を有した探触子の複数とを備えた探触子アレイであって、受信面は４つの頂部のうちの１つが他の３つの頂部よりも仮想回転軸に近接している。【選択図】 図１
