A treatment device which is used together with an endoscope, the treatment device comprising:
- a sheath through which an insertion portion of the endoscope is inserted and which forms a passage for a fluid between the sheath and an outer circumferential surface of the insertion portion of the endoscope;
- a guide pipe provided outside the sheath,
- the guide pipe including:
- a first pipe which has:
- a curving portion, and
- an opening formed at a distal side of the curving portion and allowing a distal surface of the insertion portion of the endoscope and a distal end of the sheath to protrude from the opening of the guide pipe, and
- a second pipe which is continuous with a proximal side of the curving portion of the first pipe,
- the curving portion having, in its inner circumferential surface, a bent surface which is bent relative to the second pipe and which bends a flow direction of the fluid to be discharged from the distal end of the sheath in a state where the distal end of the sheath is located in a vicinity of a distal end of the second pipe;
- a grip disposed on a proximal side of the second pipe;
- and
- an operating body assembly which is provided in the grip and which is configured to protrude the distal surface of the insertion portion of the endo scope from the distal end of the sheath and is configured to bring the distal surface of the insertion portion of the endoscope closer to or into abutment with the bent surface according to an operation of the operating body assembly in a state where the distal end of the sheath is disposed in the vicinity of the distal end of the second pipe,
- wherein:
- the operating body assembly includes a switch configured to switch between:
- a first state in which the sheath and the insertion portion of the endoscope are moved together;
- and
- a second state in which the insertion portion of the endoscope is moved relative to the sheath to protrude the distal surface of the insertion portion of the endoscope from the distal end of the sheath;
- the grip includes a first direction groove, and a second direction groove which is continuous with the first direction groove and which extends in a direction that intersects with a longitudinal axis of the first direction groove;
- the switch of the operating body assembly is configured to move the sheath and the endoscope together along the first direction groove in the first state, and
- the switch of the operating body assembly is movable through the second direction groove and is configured to protrude the distal surface of the insertion portion of the endoscope from the distal end of the sheath in the second state.