An incision tool according to the present invention includes an insertion portion and an operation portion. The insertion portion includes a first insulating member and an incision portion inserted into the first insulating member. The incision portion is at least an outer peripheral surface. A cylindrical first conductive member having conductivity, a second conductive member disposed inside the first conductive member so as to be able to project and retract from an opening at a distal end of the first conductive member, and a first conductive member A second insulating member having an opening that is fixed to the distal end and into which the second conductive member can protrude and retract, and the operation portion includes an operation main body portion and a handle member.本発明の切開具は、挿入部と、操作部とを備え、挿入部は、第一絶縁部材と、第一絶縁部材の内部に挿通された切開部とを備え、切開部は、少なくとも外周面が導電性を有する筒状の第一導電部材と、第一導電部材の遠位端の開口から突没可能に第一導電部材の内部に配された第二導電部材と、第一導電部材の遠位端に固定され第二導電部材が突没可能な開口部を有する第二絶縁部材と、を備え、操作部は、操作本体部と、ハンドル部材とを備える。
