Cleansing composition comprising the following components (A), (B), and (C):(A) 0.02% by mass or larger and 10% by mass or smaller of a polymer comprising 85 to 100% by mass as constitutional units ofa1: a constitutional unit represented by the formula (1):wherein R1 and R2 each represents an alkyl group having 1 to 4 carbon atoms and optionally having a hydroxy group, or a hydrogen atom, and R3 represents a hydrogen atom or a methyl group, anda2: a constitutional unit represented by the formula (2):wherein R4 represents a linear or branched alkyl group having 1 to 22 carbon atoms, and R5 represents a hydrogen atom or a methyl group(B) 0.5% by mass or larger and 40% by mass or smaller of an anionic surfactant and(C) water.
