A cosmetic brush having a powder tube, the powder tube being made of an elastic material, for accommodating powder, and the brush being installed at the upper portion of the powder tube, for uniformly applying powder sprayed from the powder tube to the face directly. The brush is incorporated in a housing comprised of an upper case and a lower case, and the lower case includes a lower cap which allows the powder tube to be separated for replacement. A brush guide is vertically movably installed inside the upper and lower cases. A pressing device for pressing the powder tube is provided in the lower case to supply powder.