In order to provide a material for forming a dental prosthesis which does not require further heat treatment after machining and can improve cutting ability even after obtaining necessary strength, the material for a dental prosthesis comprises 60.0 mass% or more and 80.0 mass% or less of SiO 2 , 10.0 mass% or more and 20.0 mass% or less of Li 2 O, and 5.1 mass % or more and 10.0 mass % or less of Al 2 O 3 .
