Disclosed are a crushing tip, an intraocular surgical device, a cavitation occurrence suppressing method, and a cataract operating method capable of suppressing the occurrence of cavitation. A crushing tip according to the present invention is a crushing tip attached to an intraocular surgical device that applies ultrasonic vibration, and includes a cylindrical support portion attached to the intraocular surgical device, and the support portion. And a cylindrical chip body that communicates with the internal space of the support portion, and the chip body has a length in the first direction that is longer than a length in the second direction perpendicular thereto. The cross section has a shape, and vibration is applied to the support portion so that the chip body reciprocates around the axis of the chip body passing through the centers of the first direction and the second direction. [Selection] Figure 2【課題】キャビテーションの発生を抑制することができる破砕チップ、眼内手術装置、キャビテーションの発生抑制方法、及び白内障の手術方法を提供する。【解決手段】本発明に係る破砕チップは、超音波振動を付与する眼内手術装置に取り付けられる破砕チップであって、前記眼内手術装置に装着される筒状の支持部と、前記支持部の先端に設けられ、当該支持部の内部空間と連通する筒状のチップ本体と、を備え、前記チップ本体は、第１方向の長さが、これと直交する第２方向の長さよりも長い形状を断面として有し、前記支持部には、前記チップ本体が前記第１方向及び第２方向の中心を通る当該チップ本体の軸線周りに往復回転するように振動が付与される。【選択図】図２
