PROBLEM TO BE SOLVED: To provide a method for producing indwelling needles reducing pain when being punctured with a needle tip of a metal needle.SOLUTION: The method for producing indwelling needles includes: an arrangement step of arranging an elastically deformable seal member 28 that moves relative to a metal needle 10 in an axial direction of the metal needle 10, at a first position in Figure 7 (A) for covering the surface of a needle tip 20 of the metal needle 10 an etching step of performing etching processing to a surface of the metal needle 10, with the seal member 28 disposed at the first position and making the surface being not covered by the seal member 28 rough a moving step of moving the seal member 28 from the first position to a second position in Figure 7(D) with respect to the metal needle 10 on which etching processing has been performed and an insertion step of inserting the metal needle 10 on which the etching processing has performed, into a resin needle hub 16 provided at a proximal end of a hollow resin needle 14 and including an internal space 54 having such a dimension as being sealed by the seal member 28, to a position where the seal member 28 seals the internal space 54 of the resin needle hub 16.COPYRIGHT: (C)2014,JPO&INPIT【課題】金属針の針先に穿刺された際の痛みが低減される留置針の製造方法を提供する。【解決手段】当該方法は、金属針10に対して金属針10の軸方向に相対移動する弾性変形可能な封止部材28を、金属針10の針先20の表面を覆う図7(A)の第1位置に配置する配置工程と、封止部材28が第1位置に配置された状態で金属針10の表面に対してエッチング処理を実行して、封止部材28に覆われていない金属針10の表面を粗面とするエッチング工程と、エッチング処理が実行された金属針10に対して、封止部材28を、第1位置から図7(D)の第2位置に移動させる移動工程と、中空の樹脂針14の基端部に設けられ、封止部材28によって封止可能な大きさの内部空間54を有する樹脂針ハブ16に、エッチング処理が実行された金属針10を、封止部材28が樹脂針ハブ16の内部空間54を封止する位置まで挿通する挿通工程と、を含む。【選択図】図7
