The present invention provides a powder superior in water-dispersibility/solubility, workability and tabletability, which contains an oil component containing a bioactive substance, a water-soluble polymer, a saccharide other than polysaccharides and a surfactant, at a particular ratio. The powder can be utilized for food, food with nutrient function claims, food for specified health uses, nutritional supplement, nutritional product, animal drug, drinks, feed, pharmaceutical product, quasi-drug, cosmetic and the like.