PROBLEM TO BE SOLVED: To provide a resin composite having hydroxyapatite having high affinity to a living body on a polymer surface with high density and high bonding strength.SOLUTION: The resin composite is characterized in comprising steps of forming, on the surface of a resin substrate, a composite layer composed of a resin constituting the resin substrate and calcium phosphate, and applying plasma treatment to the surface of the composite layer and then, through heat treatment including water, forming a hydroxyapatite-converted layer on the surface of the composite layer.
