In this study, nano-size magnetic poly(vinyl alcohol) particles were synthesized as heavy metal adsorbent. For this purpose glutaraldehyde was used as crosslinking agent. The adsorbent could adsorb heavy metal ions because of O-H and C=O groups of poly(vinyl alcohol) and glutaraldehyde. Effects of such parameters as order of adding materials, stirring during coating stage, amount of magnetite, and percentage of crosslinking were examined on the size of particles. Characterization of the magnetic nanoparticles showed that the smallest particles were obtained by using 100 mg magnetite and 90% crosslinking that in the coating stage, acid, poly (inyl alcohol) and glutaraldehyde were added to the reaction media simultaneously with stirring. After characterization of adsorbent, adsorption of Cu 2+ , and Pb 2+ ions were evaluated and also effects of contact time, pH, temperature, crosslinking percentage of the adsorbent and the initial concentration of the ions were examined. The results showed a rapid adsorption with greater adsorption capacity compared with that of uncoated nano magnetic particles for both ions. The maximum adsorption was obtained at 25 o C during 10 minutes, by using 50% crosslinked adsorbent, at pH of 5 and 6.5 for Cu 2+ and Pb 2+ ions, respectively. The adsorption kinetics study of the systems showed that adsorption of both ions followed the pseudo-second-order mechanism, and chemical sorption was the rate-limiting step of the adsorption process. The best interpretation for the equilibrium data was given by Langmuir isotherm, and the maximum adsorption capacities were 11.06 mg/g and 9.85 mg/g for Cu 2+ and Pb 2+ ions, respectively. Keywords : Nano magnetic adsorbent, Poly (vinyl alcohol), Glutaraldehyde, Heavy metals