[Problem] To provide: a medical container for accommodating a protein solution preparation therein, in which the denaturation of a protein contained in the protein solution preparation, including the oxidization of an amino acid residue in the protein, does not occur； a packed protein solution preparation which comprises a protein solution preparation accommodated in the medical container； and a packaged product of a packed protein solution preparation, in which the deterioration in quality of the protein solution preparation or the deactivation of the protein solution preparation which is caused by the oxidization, polymerization, anionization or the like of the protein can be prevented more effectively.[Solution] A medical container made from a cyclic olefin polymer, which is sterilized with high-pressure steam, has a property of preventing the oxidization of an amino acid residue in a protein, and can accommodate a protein solution preparation therein； a medical container made from a cyclic olefin polymer, which is sterilized with high-pressure steam, has a radical content of 2.2 × 1015 /g or less as determined using an electron spin resonance spectrometer, and can accommodate a protein solution preparation therein； a packed protein solution preparation which comprises a protein solution preparation accommodated in the medical container； a deoxygenated packaged product which comprises the packed protein solution preparation and a deoxygenating agent both packaged with a poorly oxygen-permeable packaging material； and a deoxygenated packaged product as mentioned above, which is packaged with a packaging material having light-blocking properties.Le problème décrit par la présente invention est de fournir : un récipient médical pour recevoir une préparation de solution de protéine à l'intérieur de ce dernier, dans laquelle la dénaturation d'une protéine contenue dans la préparation de solution de protéine, comprenant l'oxydation d'un résidu d'acide aminé dans la p
