Provided is a resin composition comprising 50 to 80 wt % of a norbornene-based polymer, and 20 to 50 wt % of a hydrogenated styrene-based thermoplastic elastomer, a content of a low-molecular-weight component having a molecular weight of 1000 or less in the resin composition being 3 wt % or less, in which the hydrogenated styrene-based thermoplastic elastomer is an aromatic vinyl-conjugated diene block copolymer having a styrene content of 40 wt % or more, or a block copolymer that includes an aromatic vinyl compound-based polymer block and an isobutylene-based polymer block having a styrene content of 15 wt % or more. Also, a medical drug container that shows very low protein adsorption with the passage of time is produced using such a resin composition.
