PROBLEM TO BE SOLVED: To provide a mandrel for manufacturing a metal stent in which a stent base material can be prevented from being damaged when the stent base material is diametrically enlarged.SOLUTION: A mandrel 90 for manufacturing a metal stent comprises a first member 10 having: a first tapered part 12 whose outer diameter increases from a first insertion diameter D1F to a first expansion diameter D1R； and a first straight body part 14 which is connected to the first tapered part 12 on the side where the first tapered part 12 has the first expansion diameter D1R and which has an outer diameter being the first expansion diameter D1R. The mandrel 90 further comprises a second member 20 having: a second tapered part 22 which has a hollow cylindrical shape with an inner diameter being a second inner diameter D2M through which the first straight body part 14 is inserted, and has an outer diameter increasing from a second insertion diameter D2F to a second expansion diameter D2R； and a second straight body part 24 connected to the second tapered part 22 on the side where the second tapered part 22 has the second expansion diameter D2R, the second straight body part 24 having an outer diameter being the second expansion diameter D2R.SELECTED DRAWING: Figure 2COPYRIGHT: (C)2020,JPO&INPIT【課題】ステント基材の拡径時における損傷を防止できる金属ステント製造用マンドレルを提供する。【解決手段】第１挿入径Ｄ１Ｆから第１拡張径Ｄ１Ｒまで外径が拡大する第１テーパー部１２と、前記第１テーパー部１２に対して前記第１拡張径Ｄ１Ｒである側に接続しており前記第１拡張径Ｄ１Ｒである外径を有する第１直胴部１４と、を有する第１部材１０と、前記第１直胴部１４を挿通させる第２内径Ｄ２Ｍである内径を有する中空筒状であり、第２挿入径Ｄ２Ｆから第２拡張径Ｄ２Ｒまで外径が拡大する第２テーパー部２２と、前記第２テーパー部２２に対して前記第２拡張径Ｄ２Ｒである側に接続しており前記第２拡張径Ｄ２Ｒである外径を有する第２直胴部２４と、を有する第２部材２０と、を有する金属ステント製造用マンドレル９０。【選択図】図２
