A dental prosthesis component which is a member for configuring a dental prosthesis provided with an artificial tooth root, which has a high strength and a good esthetic property. The dental prosthesis component which is a member for configuring a dental prosthesis provided with an artificial tooth root wherein the dental component is made of Zr-14Nb alloy, a surface layer containing ZrO2 as a main constituent and having a thickness of 20 &mum or more and less than 80 &mum is formed on the dental prosthesis component, and the surface has a brightness of Gy 8.0 or more of the color sheets according to Practical Color Co-ordinate System 201.