To provide a cosmetic applicator and a method for manufacturing cosmetic applicator which can prevent spots of cosmetic material tangling in brush bristles and easily applying cosmetic materials on eyelashes and eyebrows.

The cosmetic applicator 1 includes a brush bristle platform 5 on which a number of brush bristles 7 are installed on one side face in a standing manner on the tip end part of a handle 3. The brush bristle platform 5 is made in a way that the tip ends of the number of brush bristles 7 form a concave curve along an axial direction F of the handle to form a shape suited to the shape of curved eyelashes or eyebrows, etc. by making a brush bristle installed face 9 in a concave curved shape along the axial direction F of the handle 3 and the brush bristle platform 5 in the same length.