PROBLEM TO BE SOLVED: To provide a water-based eyeliner cosmetic that is excellent in smooth extension and spread, color development, glossy feeling and endurance in application without secondary adhesion, and is easily detachable when desired.SOLUTION: The water-based eyeliner cosmetic includes 0.5-10% of (A) a powder including carbon black and 40-75% of (B) an emulsion polymer of a polymer and/or copolymer including a vinyl acetate monomer.