The Jatropha Curcas is a drought resistant bushy tree. its oily seeds can produce 32 – 40 % oil. Rapid increase in the scarcity of fossil fuel has caused an eventual drive to find alternative and renewable sources of fuel. Recently, oil from the seeds of the jatropha fruit has been converted to biodiesel, which can be directly used in diesel engines. Jatropha Curcas has now been adopted as a very good source of biodiesel , with more than 32 percentange of oil content. The plant, seeds and oil of this biodiesel crop are non-edible and it is considered to be poisonous to some degree, which keeps of the cattle from it. The oil which is obtained by crushing the Seeds , with the help of an expeller is then subjected to a process called as trans-esterification in which the triglycerides are converted into methyl esters to get the biodiesel and the by-products.