PROBLEM TO BE SOLVED: To provide a composition which is excellent in the stability of pyrroloquinoline quinone or pharmacologically or physiologically acceptable salt thereof, being an external composition comprising pyrroloquinoline quinone or pharmacologically or physiologically acceptable salt thereof, and a component selected from vitamins, amino acids, and low molecule collagen.SOLUTION: (a) Pyrroloquinoline quinone or pharmacologically or physiologically acceptable salt thereof (b) at least one selected from the group consisting of vitamins, amino acids, and low molecule collagen and (c) external composition comprising a mucopolysaccharide.