Provided is a technology for the production of an outer tube for a pre-filled syringe having high transparency and produced by using a cyclic olefin resin as a raw material therefor. In a method for producing an outer tube for a pre-filled syringe formed by injection molding of a cyclic olefin resin composition, an injection molding mold is used, as a mold for injection molding, that has: a surface roughness (Rz) (ten-point average roughness) of a core configuring the injection molding mode of no more than 50 [mu]m a lubricating hard film formed that includes at least one type of element selected from Ti, Cr, Zr, C, Al, and Ni and a polished surface on the lubricating hard film.提供一種以環狀烯烴樹脂作為原料而進行製造且製造具有高度透明性之預填注射器用外筒的技術。在製造對於環狀烯烴樹脂組成物來進行射出成形而組成之預填注射器用外筒之方法,作為射出成形用模具係將構成射出成形用模具之芯部之表面粗糙度Rz(十點平均粗糙度)為50μm以下且形成包含由Ti、Cr、Zr、C、Al和Ni而選出之至少一種元素之潤滑性硬質皮膜且研磨前述潤滑性硬質皮膜之表面的射出成形用模具予以使用。1‧‧‧預填注射器10‧‧‧預填注射器用外筒20‧‧‧插管30‧‧‧柱塞101‧‧‧吸引部102‧‧‧凸緣201‧‧‧擋塊
