The present invention aims to provide an antithrombogenic metallic material which is highly safe with its low hemolytic toxicity, and which continuously exhibits high antithrombogenicity. The present invention provides an antithrombogenic metallic material comprising a metallic material whose surface is coated with a coating material, the coating material containing: a phosphonic acid derivative or a catechol derivative； a polymer containing, as a constituent monomer, a compound selected from the group consisting of alkyleneimines, vinylamines, allylamines, lysine, protamine, and diallyldimethylammonium chloride； and an anionic compound containing a sulfur atom and having anticoagulant activity； the polymer being covalently bound to the phosphonic acid derivative or the catechol derivative, the phosphonic acid derivative or the catechol derivative being bound to the metallic material through a phosphonic acid group or a catechol group thereof, wherein the abundance ratio of nitrogen atoms to the abundance of total atoms as measured by X-ray photoelectron spectroscopy (XPS) on the surface is 4.0 to 13.0 atomic percent.
