Providing a method of manufacturing a dental prosthesis which is excellent in beauty and which prevents movement of a back coating layer even where a cast coating layer is formed on a surface of the back coating layer by casting, and a kit used in the manufacturing method. In the dental-prosthesis manufacturing method and kit according to the present invention, since viscosity of a second porcelain forming the cast coating layer (36) at a predetermined casting temperature is lower than that of a first porcelain forming the back coating layer (14), movement of the back coating layer (14) is advantageously restrained.
