A therapeutic method for treating a skin wound involving administering to a patient in need thereof a composition containing pharmaceutically effective amounts of the following components: (1) a peptide consisting of the amino acid sequence represented by Ser-Ser-Ser-Arg (SEQ ID NO: 1) or pharmaceutically acceptable salts thereof and (2) a peptide consisting of the amino acid sequence represented by Phe-Gly-Leu-Met-NH2 (SEQ ID NO: 2) or substance P or pharmaceutically acceptable salts thereof, together with a pharmaceutically acceptable additive.