The invention provides an external composition, containing the components as following: (a) pyrroloquinoline quinone or physiologically acceptable salt thereof； (b) EDTA or physiologically acceptable salt thereof； and (c) at least one compound with hydroxyl groups selected from polyols with 2 to 6 carbon atoms and 2 to 4 hydroxys and dibasic alcohol, the content of the compound with hydroxyl groups (c) is more than 5 part relative to the 1 weight part of pyrroloquinoline quinone or physiologically acceptable salt (a).
