PROBLEM TO BE SOLVED: To provide: a medical container for accommodating a protein solution formulation therein which does not cause the denaturation of a protein contained in the protein solution formulation, including the oxidization of amino acid residues in the protein； a packed protein solution formulation in which a protein solution formulation is accommodated in the medical container； and a packaged product of a packed protein solution formulation, in which the deterioration in quality or deactivation of the protein solution formulation which is caused by the oxidization, polymerization, and anionization of the protein can be prevented more effectively.SOLUTION: In accordance with a first embodiment, a cycloolefin polymer-made medical container is provided which is sterilized with high-pressure steam, has an effect of preventing the oxidization of amino acid residues in a protein, and accommodates a protein solution formulation therein. In accordance with a second embodiment, a cycloolefin polymer-made medical container is provided which is sterilized with high-pressure steam, has a radical content of 2.2×1015 or less as measured using an electron spin resonance spectrometer, and accommodates a protein solution formulation therein. In accordance with a third embodiment, a packed protein solution formulation in which a protein solution formulation is accommodated in the medical container. In accordance with a fourth embodiment, a deoxygenated packaged product is provided in which the packed protein solution formulation and a deoxygenating agent are packaged in a poorly oxygen-permeable packaging material. In accordance with a fifth embodiment, a deoxygenated packaged product is provided .which is packaged in a packaging material having a light-blocking property.SELECTED DRAWING: NoneCOPYRIGHT: (C)2020,JPO&INPIT【課題】タンパク質溶液製剤に含まれるタンパク質中のアミノ酸残基の酸化などのタンパク質の変性を生じない、タンパク質溶液製剤収容用の医療用容器、当該医療用容器にタンパク質溶液製剤を収容した容器入りタンパク質溶液製剤、およびタンパク質の酸化、高分子量化、アニオン化などによるタンパク質溶液製剤の品質低下や失活が一
