To provide a means for the application of a liquid cosmetic and realize an oily liquid makeup cosmetic.

An oily makeup cosmetic flowable at 20°C under 1 atm. is applied with a cosmetic application brush having a recess on a fixing part to hold the bristles. An example of the preferable measure of the fluidity of the makeup cosmetic is a viscosity of 10,000-30,000 mPascal/sec (Brookfield viscometer: rotor 4) at 20°C under 1 atm. The recess of the brush has an opening in the direction of bristles, a dimension of preferably 10-20 mm, more preferably 12-18 mm along the direction of the bristles of the bristle bundle and preferably 5-10 mm, more preferably 6-8 mm in the direction of the bundle of the bristle bundle and the deepest depth of preferably 2-5 mm, more preferably 3-4 mm.