PROBLEM TO BE SOLVED: To provide a capsulorhexis cutter that enables intuitive operation and circular capsulorhexis.SOLUTION: A rotary member 2 rotatable around an axis line O is provided with a second through-hole 5b for penetrating through the rotary member 2 along the direction of the axis line O. The second through-hole 5b is hooked by an operation instrument 7 for pressing and rotating the rotary member 2 around the axis line O. Also, a blade part 6 is provided which projects from the rotary member 2 downward in the direction of the axis line O. When the rotary member 2 is rotated by the operation instrument 7 hooked in the second through-hole 5b around the axis line O while the blade edge of the blade part 6 is stuck into a patients anterior capsule 10, a cut line where the blade edge of the blade part 6 cuts the anterior capsule 10 is derived in an arc shape.SELECTED DRAWING: Figure 6CCOPYRIGHT: (C)2016,JPO&INPIT【課題】直感的な操作が可能であるとともに前嚢を円状に切開できる前嚢切開カッターを提供する。【解決手段】軸線O回りに回転可能な回転部材2には軸線O方向に沿って回転部材2を貫通する第2貫通孔5bが備わる。第2貫通孔5bには回転部材2を押して軸線O回りに回転させる操作器具7を引っ掛ける。また、回転部材2から軸線O方向の下方に突出する刃部6が備わる。刃部6の刃先が患者の前嚢10に刺し込まれた状態で第2貫通孔5bに引っ掛けた操作器具7で軸線O回りに回転部材2を回転させると、刃部6の刃先が前嚢10を切開する切れ目が円弧状に導かれる。【選択図】図6C