The problems to be solved by the invention are to provide an inorganic composition for obtaining an inorganic product which is excellent in physical property such as installing property, and which is economical price, as well as a process for manufacturing the product.Namely, the present invention provides, as a means to solve the conventional problems, an inorganic composition comprising the following raw materials: a hydraulic inorganic material, a siliceous material and a woody reinforcement, wherein the hydraulic inorganic material is a cementitious material, the siliceous material is a mixture of a rough particle size of siliceous material and a finely particle size of siliceous material, and the woody reinforcement is a wood powder and a pulp.The effects of the present invention, it is possible to obtain an inorganic product which is excellent in physical property such as installing property, and which is economical price.