The present invention relates to a composition for skin application, which has the effects of reducing skin wrinkles, enhancing skin elasticity and preventing skin aging, and more particularly, to a composition for skin application, which contains, as an active ingredient, a polysaccharide extract of red ginseng having a molecular weight of less than 10,000, in which the polysaccharide extract of red ginseng has the effect of increasing the expression of mitochondrial electron transport system enzymes in human skin keratinocytes to enhance the activity of the skin cells, thereby reducing skin wrinkles, increasing skin elasticity and preventing skin aging.