PROBLEM TO BE SOLVED: To provide a method for producing a fat accumulation inhibiting agent from a stevia fermentation product, and to provide a fat accumulation inhibitor containing the fat accumulation inhibiting agent as an active ingredient.SOLUTION: A method for producing a fat accumulation inhibiting agent from a stevia fermentation product using carbon dioxide comprises step A of contacting the stevia fermentation product with the carbon dioxide in supercritical state, subcritical state, or liquid state to transfer a component dissolving in the carbon dioxide to the carbon dioxide and a step B of contacting the stevia fermentation product in which the component was transferred to the carbon dioxide side with a hydrophilic polar solvent, wherein after the step B, the fat accumulation inhibiting agent contained in the hydrophilic polar solvent is dispensed.
