PROBLEM TO BE SOLVED: To provide an air needle with a protector by which simple and reliable puncture with a long air needle is performed with minimum contamination.SOLUTION: The air needle with a protector comprises: a hollow needle 11 a hub 14 holding the hollow needle 11 a path 15 inclined and communicating with the inner cavity of the hollow needle 11 a grip member 12 which includes an outer frame 18 surrounding the hub 14 and the path 15, has open both ends in the longitudinal direction of the hollow needle 11 and includes a filter 19 at the end of the path 15, being an end on a side opposite from the hollow needle 11 and a cylindrical protector 13 which covers the hub 14 and the hollow needle 11 of the grip member 12 and which is attachable and detachable by sliding within the outer frame 18 of the grip member 12.COPYRIGHT: (C)2010,JPO&INPIT【課題】長針の通気針を、最小限の汚染にとどめながら、簡便かつ確実に穿刺することができるプロテクター付通気針を提供することを目的とする。【解決手段】中空針11と、中空針11を保持するハブ部14、中空針11の内腔に対して傾斜して連通する通路部15、これらハブ部14及び通路部15を包囲し、中空針11の長手方向の両端が開放された外枠18及び通路部15端であって、中空針11とは反対側の端部にフィルタ19を備えた把持部材12と、把持部材12のハブ部14及び中空針11を被覆し、把持部材12の外枠18内でのスライドにより着脱可能な筒状のプロテクター13とを有するプロテクター付通気針。【選択図】図1