To provide a novel active ingredient that can be blended in a skin external preparation and is useful for improving skin aging and rough skin, and preventing and improving skin blotches, freckles and chloasma.SOLUTION: The present invention provides a skin external preparation containing yeast (Saccharomyces mikatae) extract, or a concentrate or dry powder thereof as an active ingredient, and a skin external preparation for whitening containing yeast (Saccharomyces mikatae) extract, or a concentrate or dry powder thereof as an active ingredient.SELECTED DRAWING: None【課題】皮膚外用剤に配合可能であり、皮膚の老化や肌荒れ改善、シミ、ソバカス及び肝斑等の予防、改善に有用な新規有効成分の提供。【解決手段】酵母（Saccharomyces mikatae）エキス、或いはその濃縮物又は乾燥粉末を有効成分とする皮膚外用剤。酵母（Saccharomyces mikatae）エキス、或いはその濃縮物又は乾燥粉末を有効成分とする美白用皮膚外用剤。【選択図】なし
