<;P>;PROBLEM TO BE SOLVED: To provide a royal jelly peptide usable for various uses such as food and beverage, medicine etc., a method for producing the same, an inhibitor for blood sugar elevation and an antioxidant comprising the same as an active ingredient. <;P>;SOLUTION: The royal jelly peptide is obtained by hydrolyzing a protein derived from royal jelly with a neutral protease such as thermoase and heating the hydrolyzed protein and pentose. <;P>;COPYRIGHT: (C)2010,JPO&INPIT