In this study, the catalytic activity of H_β-zeolite was examined in the disproportionation of toluene. The catalytic activity and selectivity to p-xylene for the disproportionation of toluene was dependent on the reaction temperature, the type of impregmented ion and the amount of impregmented ion, the type of carrier gas and the time on stream. P₂O₅ loaded H_β-zeolite showed the higher para-selectivity as compared to pure H_β-zeolite. This phenomenon may be interpreted in terms of shape selectivity arising from the partial blocking of pore or acidity modification.