Patent ID: 8758266

Claim:
A treatment tool for an endoscope comprising: a sheath member which is flexible, and has a distal end and a proximal end; a treatment part which is provided at the distal end of the sheath member; an operating part body which is provided at the proximal end of the sheath member to operate the treatment part; an operating wire which is connected to the treatment part in order to transmit a driving force to the treatment part, the operating wire being disposed in an insertion passage that extends through the sheath member and the operating part body; a slider which is provided in the operating part body, causes the operating wire to advance and retract, and causes the treatment part to drive by sliding with respect to the operating part body; and a force limiting part, which connects the operating wire and the slider, located within the insertion passage, the force limiting part being made of an elastic body with an original shape, the force limiting part being compressed in an advance-and-retraction direction and expanding in a radial direction, and when a predetermined force is applied to the force limiting part with retraction of the slider, the force limiting part contacts a wall surface of the insertion passage such that frictional engagement of the force limiting part limits movement of the slider to the predetermined force, and wherein the force limiting part is returned to the original shape when the predetermined force is no longer applied.