To provide a novel and useful injection needle capable of designing the size of the needle base without being limited by the size of the syringe connecting portion.SOLUTION: The hub has a needle base 11 formed with a through hole through which a needle tube is inserted and a cylindrical housing which is open at both axial end sides and which houses a needle base inside the one end side in the axial direction separately , The needle base 11 can be designed to be large. The housing and the needle base 11 are joined to the fitting gap 47 formed between the housing and the needle base 11 by an adhesive or welding that has penetrated from the needle tip side. A tubular guide portion 69 is provided on the back side of the top portion of the needle tube shield portion, and its end edge surface 71 abuts on the needle base 11, and the side portion 75 holds the housing in an annular shape Hold on contact. Therefore, the needle base 11 does not move even under the pressure of the chemical liquid.(FIG.【課題】針基のサイズをシリンジ接続部のサイズに制限されずに設計できる、新規且つ有用な注射針を提供する。【解決手段】ハブは、針管の挿通する貫通孔が形成された針基11と、軸方向両端側が開口し、軸方向一端側の内部に針基を嵌合収容する筒状ハウジングとを別体の射出成形品とすることで、針基11を大きく設計できる。ハウジングと針基11はその間に形成される嵌合隙間47に針先側から侵入した接着剤もしくは溶着により接合されている。針管シールド部は、箱蓋状で、その天部裏側には、管状ガイド部69が設けられており、その端縁面71が針基11に当接すると共に、側部75がハウジングを環状に抱持当接する。従って、薬液の圧力を受けても、針基11が動くことはない。【選択図】図5
