FIELD : medicine.SUBSTANCE : invention relates to the field of medicine and national economy, namely to nanocomposite biocidal polymeric material, comprising 5–40?wt.% of inorganic layered clay, modified with polydiallyldimethylammonium chloride copolymer and polymethacrylate guanidine, and 60–95?wt.% of matrix polymer, which is sevilen with content vinyl acetate units 15–30?wt.%.EFFECT : invention provides an increase in the biocidal properties of the nanocomposite material and the expansion of the range of its application with respect to various microorganisms (gram-positive and gram-negative bacteria, fungi) while maintaining the mechanical properties.1 cl, 3 tbl, 1 dwg