The conduction characteristics in oriented polypropylene (OPP) film were studied over field intensities between 10 and 300 MV/m and a range of temperature from 5 to 55 degrees C. The range of the conduction characteristics observed at 15 degrees C was divided into five regions with increasing field intensity, Particularly, in the region from 70 to 82 MV/m voltage-controlled negative resistance was displayed. In the negative resistance region, current oscillations were also observed and the mobility of carriers was 1.44 x 10(-13) m(2)/V s. The negative resistance characteristics could be explained by Gibbons’ theory.