Zinc oxide nanoparticles having a size of 7.7nm were doped in PVC solution at different concentrations and made films of thickness 0.035 cm each. The conductivity is measured for different applied fields and temperatures for ZnO nanoparticle doped and undoped films. The activation energy is calculated from Lnσ versus 1/T  10-3 K plot and found to increase with the increase of doping. The energy gap is calculated from the slope of LnR versus 1/T  10-3 K plot and found to decrease with the increase of doping rate and applied voltage, which shows the semiconducting nature.