A mascara applicator includes an application stick that is attached to a cap sealing and covering an opening part of a mascara accommodation container and that can be accommodated in the mascara accommodation container, and an application body that is rotatably attached to a tip end of the application stick and that extends in a substantially axial direction of the application stick, in which one side surface on a side opposite to a rotating direction of the application body is orthogonal to a plane including a rotation path, and a ridge part that is formed by the one side surface and a side surface adjacent to the one side surface is used, while the application body is rotated and an axis of the application body is bent with respect to an axis of the application stick, so as to apply mascara.