Disclosed in the present specification is a composition comprising a Prunus mume flower extract as an effective ingredient for treating fine dust-caused skin damage, wherein the expression of IL-36G (NM 019618), which is a gene having an expression level affected by fine dust in skin cells, is regulated to a novel level. By using the composition for treating fine dust-caused skin damage, gene expression changed by fine dust can return to a normal level to treat skin cell damage.
