To provide a cured body such as cement paste, cement mortar and concrete of which the surface layer part can be inexpensively densified in a short period of time, and which is consequently maintenance-free and has improved durability, to provide the cured body having the densified surface layer part, and to provide a method for producing the cured body.

Cement kneaded material including cement and water is cast, cast material is demolded and, thereafter, demolded material is impregnated with an alkali solution or after impregnating the demolded material with the alkali solution, is subjected to carbonation conditioning.