To provide a prosthetic member that is less likely to degrade its mechanical properties even when using it in the presence of squalene, and a method of producing the same. The prosthetic member 1 in the present invention includes a substrate 2 exhibiting excellent antioxidant properties and including an antioxidant and a polymer material, and a polymer film(s) 40 covering a surface 20 of the substrate 2 and comprising a (meth)acrylate compound. The method for producing the prosthetic member 1 in the present invention includes the steps of: forming a substrate 2 comprising an antioxidant and a polymer material, cleaning a surface 20 of the substrate 2 with a cleaning liquid, and covering the cleaned surface 20 of the substrate 2 with a polymer film(s) 40 comprising a (meth)acrylate compound.
