Provided is a disk-type mascara brush, used to makeup eyelash with mascara solution applied thereto, whose brush portion is formed whole at the end of a wand and in such a shape that pluralities of triangle-like elliptic disks are piled consecutively with an alternated arrangement with the angle of 120 degree. In a disk-type mascara brush where a brush portion 1 is provided at one end of a wand 2, a mascara cap 3 is provided at the other end of a wand 2 and the brush portion 1 is formed at the end of the wand 2 as if disks are piled; the mascara brush includes a brush portion 10 which is formed whole at the end of the wand and in such a shape that plurality of triangle-like elliptic disks are piled consecutively with an alternated arrangement with the angle of 120 degree. Thereby, a tooth-protruded portion 14, where the plate-tooth 12 is protruded, and a tooth-indented portion 16, where the plate-tooth 12 is indented, are formed at the outer circumstance of the brush portion 10 respectively; and a tooth-spaced portion 18 is formed between the tooth-protruded portion 14 and the tooth-indented portion 16.