An object of the present invention is to provide a filler capable of exhibiting semitransparent foggy effects as in fogged glasses. The present invention provides a filler comprising: a transparent or semitransparent thin platelet-like substrate； a particle layer or coating layer (hereinafter, referred to as a first layer) which is formed on the surface of the thin platelet-like substrate and composed of a hydrous oxide, carbonate, or calcined product thereof, of at least one metal (hereinafter, referred to as a first metal) selected from the group consisting of Mg, Al, and Ca； a coating layer (hereinafter, referred to as a second layer) which coats the thin platelet-like substrate comprising the first layer formed thereon and is composed of an Si hydrous oxide or calcined product thereof； and a coating layer (hereinafter, referred to as a third layer) which coats the second layer and is composed of a Ti hydrous oxide or calcined product thereof.
