Antithrombotic metallic material

An antithrombogenic metallic material comprising a metallic material having a surface coated with a non-hemolytic coating material,

• said coating material comprising:
• 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;
• said polymer being covalently bound to said phosphonic acid derivative or said catechol derivative and said anionic compound being bound to said polymer by ionic bonding, and
• said phosphonic acid derivative or said catechol derivative being bound to said metallic material through a phosphonic acid group or a catechol group thereof,
• wherein an abundance ratio of nitrogen atoms to an abundance of total atoms as measured by X-ray photoelectron spectroscopy (XPS) on the surface coated with the coating material is 4.0 to 13.0 atomic percent,
• the phosphonic acid derivative is a carboxyalkylphosphonic acid or aminoalkylphosphonic acid, and the catechol derivative is a compound of General Formula (IV), a compound of General Formula (V), a compound of General Formula (VI), or a compound of General Formula (VII):