The present invention relates to a cosmetic for eyelash comprising a film-forming polymer (a) having a rate of change in polymer content (ΔW) of 13% or more, and water, wherein a content of the film-forming polymer (a) is 0.6 to 50% by mass. The cosmetic for eyelash according to the present invention is free from formation of lumps upon use, and imparts a good curl effect to the eyelash.