Provided is a peptide which can be used as an active ingredient for a composition that can be used for stimulating the migration of a PDGFRα-positive cell, a composition that can be used for mobilizing a bone marrow mesenchymal stem cell from the bone marrow to the peripheral blood, a composition that can be used for regenerating a tissue or a composition that can be used for stimulating the migration of a bone marrow-derived stromal cell.