To increase the degree of freedom of arrangement of a first regulating part and a second regulating part in an indwelling needle puncture tool.SOLUTION: The indwelling needle puncture tool 1 is capable of rocking operation of the operation portion 13 with the intermediate portion as a fulcrum 13a, and by utilizing the displacement in the backward direction of one end portion and the other end portion caused by the swing operation, 1 regulating portion 11 and the second regulating portion 12 is canceled, as compared with the case where the regulation by the first regulating portion 11 and the second regulating portion 12 is released based on the displacement in the same direction, the first regulating portion 11 And the second restricting portion 12 are arranged apart from each other, and the degree of freedom of arrangement of the first regulating portion 11 and the second regulating portion 12 is increased.(FIG.【課題】留置針穿刺具において第1規制部及び第2規制部の配置の自由度を高める。【解決手段】留置針穿刺具1は、操作部13が中間部を支点13aとして揺動操作可能であり、該揺動操作に伴う一端部及び他端部の背反方向の変位を利用して第1規制部11及び第2規制部12による規制を解除することで、同方向の変位に基づいて第1規制部11及び第2規制部12による規制を解除する場合に比べ、第1規制部11と第2規制部12とを離間して配置するなど、第1規制部11及び第2規制部12の配置の自由度が高められる。【選択図】図1
