PROBLEM TO BE SOLVED: To provide an electrosurgical instrument with a multi-electrode electrosurgical tip.SOLUTION: An electrosurgical instrument comprises: a first arm 12 carrying a first electrode 16, a second electrode 18, and insulating portions 28； and a second arm 14 opposing the first arm 12, the second arm 14 having an electrode which is a floating electrode. The second arm further includes a first insulating portion 28d which substantially surrounds the electrode 20. The electrode 20 may be coplanar with the first insulating portion 28d or may extend beyond the surface of the first insulating portion 28d.SELECTED DRAWING: Figure 3【課題】多電極電気手術先端を有する電気手術器具を提供する。【解決手段】第１のアーム１２が、第１の電極１６と、第２の電極１８及び絶縁部２８とを担持し、第１のアーム１２に対向する第２のアーム１４とを含み、第２のアーム１４は、浮遊電極である電極を有する。さらに第２アームは電極２０を実質的に囲む第１の絶縁部２８ｄを含む。また電極２０は第１の絶縁部２８ｄと同一の平面上にあっても、第１の絶縁部２８ｄの面を越えて伸びていてもよい。【選択図】図３
