The effect of metal-modified catalyst on the pyrolysis behaviors of jatropha de-oiled cake was examined. With py-GC/MS method, ca.80 % of aromatic hydrocarbons with other by-products was produced in the presence of Ni/activated carbon or Pt/zeolite catalyst. The aromatic selectivity is dependent on both the weight ratio of catalyst/jatroppha and reaction conditions. In fact, under conditions of quartz reactor and Pd/zeolite catalyst, the aromatic selectivity was found to be ca.40% and efforts have been made to improve selectivity and oil yield.