It is an object of the present invention to suppress agglutination of ultrafine cellulose fibers, while using the ultrafine cellulose fibers as a thickener in a cosmetic product formulation, so as to provide a uniform cosmetic. The present invention provides a cosmetic comprising the following components (A) and (B):(A) ultrafine cellulose fibers having a fiber width of 1000 nm or less and(B) a water-soluble polymer.