The present invention is a cosmetic for eyelashes characteristically comprising modified cross-section hollow fibers. What is preferable is a cosmetic for eyelashes characteristically containing said modified cross-section hollow fibers that are polygonal cross-section hollow fibers having depressions so they can orient along the eyelashes wherein the length of the hollow fibers is 0.5-4 mm and the size is 20-50 μm.The object of the present invention is to provide a cosmetic for eyelashes that exhibits a superior curling effect and long lash effect and allows a beautiful finish.