PROBLEM TO BE SOLVED: To provide a manufacturing method of a syringe with a needle configured to reliably hold a needle, having high airtightness, and easily manufactured at a low production cost, and the syringe with the needle.SOLUTION: A manufacturing method of a syringe with a needle includes: a first step of forming a syringe 2 having opening parts 2a and 2b at both ends a second step of forming a holding member that has a face part 3a, and an insertion part 3b projecting from the face part 3a, where an injection needle 4 penetrates through the inside of the insertion part 3b to be joined a third step of inserting the insertion part 3b of the holding member 3 into the opening part 2a of the one end of the syringe 2 and pressing the holding member 3 toward the syringe 2 such that the face part 3a comes into contact with the end face 2c of the opening part 2a at prescribed contact pressure respectively and a fourth step of ultrasonically welding the contacted surfaces, with the holding member 3 pressed toward the syringe 2.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2018,JPO&INPIT【課題】 針が確実に保持され、気密性が高く、低い製造コストで容易に製造可能な針付シリンジの製造方法および針付シリンジを提供する。【解決手段】 両端に開口部2a,2bを有するシリンジ2を形成する第1の工程と、面部3aと、当該面部3aから突出する挿入部3bとを有し、注射針4が挿入部3bの内部を貫通して接合された保持部材を形成する第2の工程と、保持部材3の挿入部3bをシリンジ2の一端の開口部2aに挿入し、面部3aが、開口部2aの端面2cとそれぞれ所定の面圧で当接するように保持部材3をシリンジ2に押圧する第3の工程と、保持部材3をシリンジ2に押圧した状態で、当接した面同士で超音波溶着を実施する第4の工程と、を有する針付シリンジの製造方法を提供する。【選択図】図1
