The invention relates to a novel peptide. The object of the invention is to provide a new material in a biological body capable of promoting the integrin or the collagen. The new material is constituted by the peptide formed by the amino acid sequence expressed by the following formula (I)Gly-Arg-Ile-Arg-Val-Leu(SEQ ID NO:1),or the amino acid sequence is provided with one or a plurality of peptides or the ramification of the peptides, or the salts additionally provided with/missing/or replaced by the amino acids.
