PROBLEM TO BE SOLVED: To provide an MCH (Melanin-Concentrating Hormone) or enzymatic decomposition products thereof, having feeding regulation ability and widely utilizable in medical drugs, quasi-drugs, food additives, functional foods, etc.SOLUTION: This feeding regulation peptide is obtained as an MCH or its enzymatic decomposition product of mammals. Also the obtained substance excels in safety since it is a physiologically active substance in vivo, and utilizable in wide applications.