PROBLEM TO BE SOLVED: To provide an excellent propylene-based resin composition for radiation sterilization corresponding medical kit preparation conforming to a test item of "a polyethylene-made or polypropylene-made aqueous injection container according to standard 2.1 of a plastic-made aqueous injection container in a plastic-made medicine container test method 2. 7.02 listed in the 16th reversion Pharmacopoeia of Japan" even after radiation sterilization is performed, and to provide a medical kit preparation of the same.SOLUTION: A propylene-based resin composition for radiation sterilization corresponding medial kit preparation is obtained by blending 0.01-1 pts.wt. of an amine-based antioxidant with respect to 100 pts.wt. of a propylene-based resin (A) composed of 51-99 pts.wt. of a propylene-ethylene copolymer (a) and 1-49 pts.wt. of an elastomer (b), and does not substantially blend a nucleating agent having an aromatic substituent group.SELECTED DRAWING: NoneCOPYRIGHT: (C)2018,JPO&INPIT【課題】放射線滅菌を行った後でも「第16改正 日本薬局方 7.02 プラスチック製医薬品容器試験法 2. プラスチック製水性注射剤容器の規格 2.1. ポリエチレン製又はポリプロピレン製水性注射剤容器」の試験項目に適合する優れた放射線滅菌対応医療キット製剤用プロピレン系樹脂組成物及びその医療キット製剤を提供する。【解決手段】プロピレン-エチレン共重合体(a)51~99重量部及びエラストマー(b)1~49重量部からなるプロピレン系樹脂(A)100重量部に対し、アミン系酸化防止剤を0.01~1重量部配合してなり、かつ、芳香族置換基を有する造核剤を実質的に配合しないことを特徴とする放射線滅菌対応医療キット製剤用プロピレン系樹脂組成物。【選択図】なし