AbtractProvided is a detergent composition comprising the following components (a), (b) and (c): (a) an anionic surfactant, (b) a water soluble cationized polymer having a weight average molecular weight of from 100,000 to 2,000,000 and a charge density of from 0.6 to 4 meq/g, and (c) a silicone derivative having a group containing both a hydroxy group and a nitrogen atom as a side chain thereof bonded to a silicon atom. The detergent composition provides rich foaming during washing and at the same time and is capable of giving excellent conditioning effects to the hair and the like.1 1.