| abstract |
A treatment tool of an endoscope including: a movable tip end portion that performs a treatment on a living body; a flexible first coil sheath into which a wire is spirally wound; a flexible second coil sheath into which a wire is spirally wound and which is concentrically fitted onto or into the first coil sheath; a flexible operation wire that is formed into an elongated thin shape, a tip end thereof being connected to the movable tip end portion, and the operation wire being movably inserted into the first coil sheath; and an operation portion for advancing and retracting the operation wire, in which a tip end of the second coil sheath is fixed to the movable tip end and a base end thereof is fixed to the operation portion. |