Cosmetic additives and cosmetics containing the same

A good transparency when blended in a cosmetic, elongation and feeling upon application is good, provides a cosmetic additives and cosmetics containing the same which can suppress the stickiness during drying about. A mean fiber diameter (D) is 0.001 to 0.05 .mu.m, the average fiber length to the average fiber diameter (D) ratio (L / D) is 5 to cellulose fibers is 500 (L) including, cosmetic additives and cosmetic comprising the cosmetic additive. .BACKGROUND