Patent ID: 7963910

Claim:
An endoscope accessory used in combination with an endoscope, the endoscope including: an insertion portion which has a first end region, a second end region, and an accessory insertion channel extending between the first end region and the second end region in the insertion portion and having an entrance in the second end region and an exit opened at the first end region, the first end region being configured to be inserted into a living organism, and an operation portion which is provided at the second end region of the insertion portion, in which a suction conduit is formed, the suction conduct having an entrance and an exit both of which are opened at different points in an outer surface of the operation portion, and the exit of the suction conduit being configured for communicating with a suction device, the entrance of the suction conduit and the entrance of the accessory insertion channel in the outer surface being opened and disposed side by side, and wherein a communication path is formed in a region of the operation portion near the entrances to communicatively connect the suction conduit and the accessory insertion channel with each other, and the endoscope accessory comprising: a tubular insertion unit which has a distal end region and a proximal end region, the distal end region being configured to be detachably inserted into the accessory insertion channel through the entrance of the accessory insertion channel and to be movable along the accessory insertion channel; and a tubular connection unit which is provided at the proximal end region of the insertion unit and which is configured to be detachably connected to the entrance of the suction conduit, the tubular connection unit including a sealing unit which seals a gap between the tubular connection unit and the entrance of the suction conduit and which seal a communication between the communication path and the suction conduit when the tubular connection unit is detachably connected to the entrance of the suction conduit, so that a suction force from the suction device through the suction conduit is supplied to the tubular insertion unit through the tubular connection unit.