A puncture needle tube component of an indwelling needle with a needle tip protective sleeve comprises a puncture needle tube (1), a needle seat (2), a ventilating plug (3) and an operating handle (6). A blood return observation cabin (21) is located in a core cavity of the needle seat (2). A tail end of the puncture needle tube (1) is inserted in a front end part of the blood return observation cabin (21) and is fixedly connected. The needle seat (2) extends along an axial direction of the inner cavity of the operating handle (6) and is fixedly connected to the operating handle (6). The ventilating plug (3) is fixedly plugged in the tail end of the blood return observation cabin (21). The puncture needle tube component enables the needle seat (2) to continue extending along the axial direction and increases a blood receiving volume and a blood receiving length of the blood return observation cabin (21). Not only the number of assembling fittings is reduced but also assembling is convenient and an operating misjudgment is not easy to happen. A positioning plug in the prior art is replaced with a bonder, so that the position of the needle seat (2) relative to the operating handle (6) can be adjusted in an assembling process to obtain an accurate distance.La présente invention concerne un composant canule daiguille de ponction dune aiguille à demeure avec un manchon de protection de pointe daiguille, ledit composant comprenant une canule daiguille de ponction (1), un siège daiguille (2), un bouchon de ventilation (3) et une poignée dactionnement (6). Un compartiment dobservation du retour du sang (21) se trouve dans une cavité centrale du siège daiguille (2). Une extrémité de queue de la canule daiguille de ponction (1) est insérée dans une partie dextrémité avant du compartiment dobservation de retour du sang (21) et fixement raccordée. Le siège daiguille (2) sétend le long dune direction axiale de la cavité intérieure de la poignée dactionnement (6) et est fixement
