The electrocatalytic oxidation of 2-chlorophenol on a composite PbO2/polypyrrole (PPy) electrode was carried out in 0.1M H2SO4 solution. The composite PbO2/PPy electrode was developed by the codeposition of polypyrrole and PbO2 microparticles on the PbO2/SnO2/Ti substrate. The PbO2 microparticles and polypyrrole in the composite electrode were observed to be hydrophilic active-sites and hydrophobic inactive-sites, respectively. The results indicated that the conversion of 2chlorophenol and the efficiency of electrooxidation were improved on the hydrophobic-modified PbO2/PPB electrode. The performance for electrooxidation of 2chlorophenol on the composite PbO2/PPY electrode was better than that on Pt or PbO2/SnO2/Ti electrodes. The thicker the composite (PbO2/PPy) layer, the more active-sites in the composite electrode and the more 2-chlorophenol could be oxidized.