FIELD: cosmetics. SUBSTANCE: invention provides aerosol container-packaged hair-setting foam composition comprising liquid phase, which contains, in cosmetically acceptable liquid milieu, at least one film-forming fixation polymer selected from branched block copolymers having, as principal monomers, at least one C1-C20-alkyl acrylate and/or at least one N-mono- or N,N-di-C2-C12- alkyl(meth)acrylamide and acrylic acid and/or (meth)acrylic acid, and at least one propellant. Hair setting method using this composition is also provided. EFFECT: prolonged hair-setting firmness without loss of cosmetic properties. 23 cl, 1 tbl, 6 ex
