A mascara brush capable of achieving the volume-up and curling of eyelashes by raising eyelashes with a mascara material applied is provided. The mascara brush is withdrawn from a mascara container, a button on the top of a grip is pressed, and then the brush is bent from a brush rod in an arc shape by a working member within a brush base, to prevent mascara materials adhered to a mascara rod from staining the periphery of eyes or nose, thereby providing a convenient use.