PROBLEM TO BE SOLVED: To provide a medical tool which enables a function part to be sufficiently displaced even at a small bending angle by employing a structure capable of securing a large dimension in a longitudinal direction of a shape-memory part even without special enlargement of a length dimension of the whole tool.SOLUTION: A medical tool includes: a rod-shaped grip part 1 disposed at a base end a function part 3 for use in a medical act, which is disposed at a tip a shape-memory part 2 made of a rod-shaped shape-memory alloy and disposed between the grip part 1 and the function part 3 and a holding part 1A formed in the grip part 1 and covering the whole outer surface of a part of the base end side of the shape-memory part 2 with a flexible material. The shape-memory part 2 is storage-processed in a linear state. When the shape-memory part 2 is bent, the deformation of the shape-memory part 2 beyond a predetermined range is regulated by an elastic force of the holding part 1A.COPYRIGHT: (C)2014,JPO&INPIT【課題】器具全体の長さ寸法を特別に大きくせずとも、形状記憶部の長手方向で大きな寸法を確保することができる構造とすることで、小さな折り曲げ角度でも機能部を充分に変位させることが可能な医療用器具を提供する。【解決手段】基端に棒状の把持部1、先端に医療行為に用いられる機能部3、把持部1と機能部3の間に設けられる棒状の形状記憶合金からなる形状記憶部2及び把持部1に形成されて形状記憶部2の基端側の一部の外面全体を可撓性の素材によって被覆する保持部1Aと、を有し、形状記憶部2は直線状態で記憶処理され、形状記憶部2を折り曲げる際、保持部1Aの弾性力によって形状記憶部2が所定範囲を超えて変形するのを規制する。【選択図】図7
