Biodiesel was produced based on bench scale by transesterification of jatropha oil according to the optimum reaction conditions obtained from laboratory study with maximum yield of 98 % of methyl esters. Transesterification of 2 kg of jatropha oil was carried out in 4 L round flask placed in an adjusted temperature water bath. The reaction was performed using 6:1 molar ratio of alcohol to oil and catalyst concentration of 1 % by weight of the oil at 65 º C under reflux condenser with mechanical stirrer as illustrated in Fig. 1. After one hour reaction time, the reaction mixture was carefully transferred to a suitable separating funnel. Two layers were separated after about 6 h; the upper layer is methyl esters and the lower one is the glycerol containing layer