A peptide for lowering blood glucose level is used to solve the problem of side effects induced by conventional dipeptidyl peptidase 4 (DPP-4) inhibitor. The peptide has an amino acid sequence set forth as SEQ ID NO: 1. Use of the peptide is also disclosed.一種具有降血糖活性的胜肽,用以解決部分患者在投予習知二肽基肽酶-4的抑制劑會誘發副作用的問題。該胜肽具有如SEQ ID NO:1所述之胺基酸序列。本發明另關於該胜肽的用途。