PROBLEM TO BE SOLVED: To prevent disturbance in resolution in a scanning direction by suppressing occurrence of ram wave propagated in scanning direction of a vibrator.SOLUTION: An ultrasonic probe 2 is equipped with a plurality of vibrators 100 arrayed in a scanning direction (X direction). The plurality of vibrators 100 are separated from each other by dividing a piezoelectric body which transmits/receives supersonic waves by a first division groove (main die groove) 31 at each specified interval. Each of the plurality of vibrators 100 includes a plurality of division elements (sub die element)101 formed by further being divided by a second division grove (sub die groove)32 parallel to the first division groove. The plurality of division elements comprise at least two kinds of division elements (sub die element) 101a, 101b having different dimension in the scanning direction.COPYRIGHT: (C)2014,JPO&INPIT【課題】振動子の走査方向に伝播するラム波の発生を抑制し、走査方向の分解能が乱れるのを防止すること。【解決手段】走査方向(X方向)に配列された複数の振動子100を備えた超音波探触子2において、複数の振動子100は、超音波を送受信する圧電体を所定の間隔毎に第1の分割溝(メインダイス溝)31により分割することで互いに分離され、複数の振動子100の各々は、第1の分割溝と平行な第2の分割溝(サブダイス溝)32により更に分割されて形成された複数の分割素子(サブダイス素子)101を備え、複数の分割素子は、走査方向の寸法の異なる少なくとも2種類の分割素子(サブダイス素子)101a、101bからなる【選択図】図3
