Abstract: An object of the invention are macroporous polymeric membranes, suitable above all for the separation of polymers, which consists of the copolymer of a monovinyl monomer, selected from the group comprising acrylates, methacrylates, vinylpyridine, N-vinylpyrrolidone, vinyl acetate, and hydroxystyrene, with a divinyl monomer, selected from the group comprising alkylene and hydroxyalkylene diacrylates and dimethacrylates, divinylbenzene, and divinylpyridine, at the ratio of monomers of both types ranging from 5:95 to 95:5 wt. %. The membranes are formed from polymeric globular entities which have the size 0.05 to 0.5 .mu.m and are interconnected by covalent bonds, whereas communicating voids--pores occur between the globuli.The total thickness of membranes is 0.2 to 15 mm. and their specific surface area, which is measurable also in the dry state, may attain 400 m.sup.2 /g. Glycidyl methacrylate is advantageously used as the monovinyl monomer in the amount 5-80 vol. % related to the total volume of monomers.