To provide a material having ion forming capacity effective for accelerating the cleaning of air, the physiological metabolic action of a living body or the like.

An adhesive layer 2 is formed on the surface of a base material 1 comprising a synthetic material or a natural material so as to form a thin layer. In a front stage curing the surface of the adhesive layer, an ion forming natural radioactive rare earth element 3 formed into a fine powdery form is sprinkled over the surface of the surface layer 2 to be fixed to the surface of the base material 1 highly densely through the adhesive layer 2.