There is provided a photoaging protective composition having an effect of protecting photoaging on skin cell, the composition including chromenes derived from Sargassum horneri. Specifically, for the photoaging protective composition, sargachromanol D and sargachromanol E isolated from Sargassum horneri, brown algae exhibits activity of inhibiting MMPs, increase an expression of a collagen synthetic marker, such as procollagen and Type I collagen in fibroblasts treated with UV-A, or increases elastin by controlling elastase. For this reason, the chromenes derived from Sargassum horneri according to the present invention can be used as uses of a material or cosmetic products for improving and preventing skin wrinkles, the material having an effect of improving skin wrinkles caused by UV.
