4-n-butylresorcinol as an active ingredient. The present invention relates to a composition for inhibiting skin erythema or inflammation reaction by ultraviolet rays. According to the present invention, it is possible to inhibit the ultraviolet erythema reaction and the inflammatory reaction by inhibiting the production of inflammatory mediators of prostaglandin (prostaglandin E 2 , PGE 2 ) by ultraviolet rays.
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