To provide a glass ceramic which is easily handled in the manufacturing process, hardly causes surface peeling and the degradation with time and has high photocatalytic characteristics, a method of manufacturing the same and particularly to provide a glass ceramic formed into a desired shape by a relatively simple method and having high photocatalytic activity.

The glass ceramic comprises a crystalline composition containing at least one kind selected from TiO2 or its solid solution and a vitreous composition containing at least one kind selected from an SiO2 component, a B2O3 component or a P2O5 component, wherein the vitreous composition is a matrix component. The crystalline composition can have a crystal type having high photocatalytic performance.