The present invention relates to a cosmetic composition, especially a hair composition, comprising: one or more associative nonionic polymers especially of polyurethane polyether type in an amount ranging from 2% to 60% by weight relative to the total weight of the composition, and one or more nonionic surfactants of the alkylpolyglycoside type. The invention also relates to a cosmetic treatment process using the said composition, especially a hair treatment process in particular for cleansing the hair and/or the scalp.
