Cation exchange distribution coefficients of poly(dithiocarbamate) were presented for Cd^2+, Cr^3+, and Pb^2+ in HCl. The distribution coefficients were determined by using the batch method. Based on these distribution data, the separation possibilities of the heavy metal ions were discussed. The distribution coefficients of three heavy metal ions on dithiocarbamate resin were decreased as HCl concentrations were increased. The selective separation of Cr^3+ and Cd^2+ was possible by using 0.1 M HCl in dithiocarbamate resin and the reproducibility test showed that the average absorptivity of resin was 90% in the case of Cd^2+ ion by the column method.