Patent ID: 7699836

Claim:
A treatment tool for an endoscope, comprising: a flexible sheath being made of electrically insulating material to be inserted through an instrument channel of the endoscope, an operation wire, which is adapted to be advanced and retracted in an axial direction of the sheath inside the sheath, a treatment instrument, which is arranged at a distal portion of the treatment tool and is adapted to be protruded and retracted from a distal end of the sheath, and a fluid channel with an opening, through which fluid is ejected toward the treatment instrument, wherein the operation wire and the fluid channel are arranged inside the sheath in parallel with an axis of the sheath, wherein the treatment instrument is connected to the operation wire in a laterally displaced position with respect to the operation wire, and is arranged in front of the opening of the fluid channel; wherein the operation wire is connected to the treatment instrument via a connecting member having a distal surface, wherein the sheath is provided with a stopper surface at the distal end thereof, the stopper surface being inclined with respect to the distal surface of the connecting member when the connecting member is installed in the sheath, wherein an orientation of the treatment instrument is changed correspondingly to the inclination of the stopper surface by having the distal surface of the connecting member pressed against the stopper surface when the operation wire is pressed from a proximal end of the sheath toward the distal end of the sheath.