An aqueous hair cleansing agent containing the following components (A), (B) and (C) and water: (A) an anionic surfactant (B) a specific organo polysiloxane and (C) one or more of cationized polymer(s) selected from (c-1) and (c-2): (c-1) a cationized polymer having cellulose skeleton or galactomannan skeleton and (c-2) a cationic polymer having diallyl dimethylammonium salt skeleton.