The invention relates to cosmetic compositions, and in particular hairstyling gels, containing in a cosmetically acceptable carrier (a) at least one fixing film-forming polymer chosen from branched block copolymers comprising, as principal monomers, at least one C.sub.1-20 alkyl acrylate and/or at least one N-mono- or N,N-di(C.sub.2-12 alkyl)(meth)acrylamide, and acrylic acid and/or methacrylic acid, (b) at least one thickening agent chosen from homopolymers and copolymers based on (meth)acrylic acid, which are crosslinked or noncrosslinked, and (c) at least one cothickening agent chosen from noncellulosic thickening polymers different from (b).