An incision tool comprising: a sheath; a plurality of wires that are inserted through an internal space of the sheath, as a result of a portion thereof being inserted through both first wire insertion through holes that are provided in a distal end portion of the sheath and second wire insertion through holes that are provided on the sheath distal end side of the first wire insertion through holes, are exposed on the outside of the sheath between the first wire insertion through holes and the second wire insertion through holes, the plurality of wires being adapted to receive high-frequency current; and an operating unit that is connected to a base end side of the wires and that is adapted to adjust the length of the exposed portions of the wires which are exposed on the outside of the sheath by moving forwards or backwards relative to the sheath in the longitudinal direction of the wires; wherein two stabilizers are (16a, 16b) provided inside the sheath, each stabilizer (16a, 16b) being formed by a circular plate portion and by protruding portions having a fan-shaped cross section and extending from one side of the circular plate portion in a direction perpendicular to the circular plate portion, and a wire guide groove formed between the protruding portions, the wire guide groove being provided at a position that corresponds to the first wire insertion through holes and the second wire insertion through holes, wherein the plurality of wires each have a base end side insertion portion that is inserted into the internal space of the sheath on the base end side of the first wire insertion through hole, an exposed portion that extends from the base end side insertion portion towards the distal end side and passes through the first wire insertion through hole so as to be exposed on the outside of the sheath by being guided by the groove, a distal end side insertion portion that extends from the exposed portion towards the distal end side and passes through the second wire insertion through hole so as to enter again into the internal space of the sheath by being guided by the groove, and a bent portion that is provided in an end portion on the exposed portion side of the distal end side insertion portion and that bends the wire in the axial direction of the sheath from the direction in which it enters into the internal space of the sheath via the second wire insertion through hole, and the plurality of wires are bound together into a single bundle in the distal end side insertion portion on the distal end side of the bent portions by a binding component. a sheath; a plurality of wires that are inserted through an internal space of the sheath, as a result of a portion thereof being inserted through both first wire insertion through holes that are provided in a distal end portion of the sheath and second wire insertion through holes that are provided on the sheath distal end side of the first wire insertion through holes, are exposed on the outside of the sheath between the first wire insertion through holes and the second wire insertion through holes, the plurality of wires being adapted to receive high-frequency current; and an operating unit that is connected to a base end side of the wires and that is adapted to adjust the length of the exposed portions of the wires which are exposed on the outside of the sheath by moving forwards or backwards relative to the sheath in the longitudinal direction of the wires; wherein two stabilizers are (16a, 16b) provided inside the sheath, each stabilizer (16a, 16b) being formed by a circular plate portion and by protruding portions having a fan-shaped cross section and extending from one side of the circular plate portion in a direction perpendicular to the circular plate portion, and a wire guide groove formed between the protruding portions, the wire guide groove being provided at a position that corresponds to the first wire insertion through holes and the second wire insertion through holes, wherein the plurality of wires each have a base end side insertion portion that is inserted into the internal space of the sheath on the base end side of the first wire insertion through hole, an exposed portion that extends from the base end side insertion portion towards the distal end side and passes through the first wire insertion through hole so as to be exposed on the outside of the sheath by being guided by the groove, a distal end side insertion portion that extends from the exposed portion towards the distal end side and passes through the second wire insertion through hole so as to enter again into the internal space of the sheath by being guided by the groove, and a bent portion that is provided in an end portion on the exposed portion side of the distal end side insertion portion and that bends the wire in the axial direction of the sheath from the direction in which it enters into the internal space of the sheath via the second wire insertion through hole, and the plurality of wires are bound together into a single bundle in the distal end side insertion portion on the distal end side of the bent portions by a binding component.