| 摘要 |
An endoscope has a flexible insertion section extending from an operation section. A chamber is formed in the extended end of the insertion section to open externally, and a guide channel extends from the chamber to an inlet formed at the operation section through the insertion section. A guide member is movably arranged in the chamber. One end of a wire is coupled to the guide member, and the member is rotated by pushing or pulling the wire. When a treating unit is introduced into the chamber through the inlet and the guide channel, the guide member guides the end portion of the treating unit in a predetermined direction. The chamber has a side wall for guiding the member, and the member has a side wall opposite to the side wall. A friction reducing member is fixed to the side wall and contact with the side wall of the chamber so as to reduce the friction between the side walls.
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