It is discharged the case of the air bleed, the user that try can guttation the medicine which accumulates in the skin contact section easily. The needle tube 5 which possesses ahead the needle which the stab is done and needle hub 6 and the medicine it has with guttation possible guttation section 26 for the skin. Needle hub 6 is laid out and in order the attaching part containment the needle tube (1st component 11) with, for the interposition section to cover around 31 where discharge section 52 of the syringe is interposed and needle tube 5, needle tube 5 in the living body the occasion where the stab it does contact and/or possesses with the skin contact section 25 of the flange condition which opposes on the skin. In addition, guttation section 26 is provided in skin contact section 25 of needle hub 6.空気抜きの際に排出され、皮膚接触部にたまった薬剤を使用者が容易に排水することができるようにする。皮膚に穿刺される針先を有する針管５と、針ハブ６と、薬剤を排水可能な排水部２６とを備える。針ハブ６は、針管を保持する保持部（第１部材１１）と、シリンジの排出部５２が挿入される挿入部３１と、針管５の周囲を覆うように配置され針管５を生体に穿刺する際に皮膚に接触及び／又は対向するフランジ状の皮膚接触部２５とを有する。また、排水部２６は、針ハブ６の皮膚接触部２５に設けられている。
