The present invention addresses the problem of providing a cosmetic which contains a micro-fibrous cellulose as a thickening agent in the formulation thereof, does not undergo the aggregation of the micro-fibrous cellulose, and is homogeneous. According to the present invention, a cosmetic comprising the components (A) and (B) mentioned below is provided. (A) A micro-fibrous cellulose having fiber widths of 1000 nm or less; and (B) a water-soluble polymer.