PROBLEM TO BE SOLVED: To provide a puncture needle improved in operability by an operator and safety of a patient.SOLUTION: A puncture needle includes: an outer cylindrical pipe having a curve-shaped tip part and an inner needle inserted into the outer cylindrical pipe. The puncture needle includes a restriction part restricting relative movement between the outer cylindrical pipe and the inner needle by engagement between one end side of the outer cylindrical pipe and one end side of the inner needle with each other, and the restriction part includes: a linear engagement part formed in the one end side of the outer cylindrical pipe or the inner needle and a point-like engagement part formed in the one end side of the inner needle or the outer cylindrical pipe, and guided along the linear engagement part. The linear engagement part includes a crossing guide part extending in a direction crossing a long direction of the outer cylindrical pipe or the inner needle.COPYRIGHT: (C)2015,JPO&INPIT【課題】術者にとっての操作容易性、および患者にとっての安全性を向上させた穿刺針を提供すること。【解決手段】湾曲形状の先端部を有する外筒管と、該外筒管の内部に挿入される内針とを含む穿刺針であって、前記外筒管の一端側と前記内針の一端側とが互いに係合することによって、前記外筒管と前記内針との相対的な移動を規制する規制部を備え、前記規制部は、外筒管又は内針の前記一端側に設けられた線状係合部と、内針又は外筒管の前記一端側に設けられ、前記線状係合部に沿って案内される点状係合部と、を含み、前記線状係合部は、前記外筒管又は前記内針の長手方向に対して交差する方向に伸びる交差状案内部を含む、穿刺針。【選択図】図1
