[PROBLEMS] To provide a novel agent for inhibiting the intestinal permeation of an allergen. [MEANS FOR SOLVING PROBLEMS] Disclosed is an agent for inhibiting the intestinal permeation of an allergen, wherein the agent comprises a peptide having an amino acid sequence NPWDQ or GPIVLNPWDQ. The peptide is found in an enzyme-modified cheese (EMC) which has been treated with various enzymes. The peptide can alleviate the conditions of food allergy in a food allergy patient when administered in the form of a pharmaceutical composition or ingested together with a food containing a food allergen such as ovalbumin.
