PROBLEM TO BE SOLVED: To provide a new agent capable of prevention of visceral fat accumulation or reduction of accumulated fat, namely, improvement of accumulation, in an objective person having a fat energy ratio exceeding 30%.SOLUTION: This invention relates to an accumulation preventing or accumulation improving agent of visceral fat having epilactose as an effective component. The accumulation preventing or accumulation improving agent of visceral fat is used for an objective person having the fat energy ratio exceeding 30%.