Disclosed are: a plastic film for medical containers, which has oxygen absorbing function； and an infusion bag which is formed of the plastic film for medical containers. Specifically disclosed is a plastic film for medical containers, which is composed of at least four layers, namely: a first layer (1) that is composed of a polyamide that is obtained by ring-opening polymerizing a lactam having 11 or more carbon atoms or by polycondensing an ω-amino acid having 11 or more carbon atoms, or a polyamide that is obtained by copolycondensing a dicarboxylic acid having 10 or more carbon atoms and a diamine having 6 or more carbon atoms: a second layer (2) that is formed adjacent to the first layer and composed of a mixed composition that contains an ethylene-vinyl alcohol copolymer as a main component, while containing a polyene polymer having an unsaturated double bond and a transition metal salt as sub-components； a third layer (3) that is formed adjacent to the second layer and contains, as a main component, a copolymer of an α-olefin and an anhydride monomer of an unsaturated carboxylic acid or an unsaturated dicarboxylic acid； and a sealing layer (4) that contains a polyethylene as a main component. The plastic film for medical containers is formed by co-extrusion using a water-cooled inflation method.
