Abstract: Tungstoborate and tungstogermanate heteropoly compounds containing rare earth elements with the general formula K₁₅Ln(BW₁₁O₃₉)₂·nH₂O and K₁₃Ln(GeW₁₁O₃₉)₂·nH₂O, where Ln=La, Ce, Pr, Nd, Sm, have been synthesized and characterized by elemental analysis, IR, ¹⁸³W NMR spectra. The results of experiments on cytotoxicity and anti-influenza virus activities using cellcultivation method showed that four compounds among them exhibited good inhibitory effect on influenza virus.