Jatropha oil can be used as fuel alternative and biodiesel. Solid liquid extraction is commonly used to extract the oil from jatropha because it is efficient and cheap. This new process takes about 8 hours and yields around 36-47%. Oil using ultrasound with the conventional solid liquid extraction. It improves the yield of oil in comparison to conventional method. The maximum amount of oil extracted by conventional and ultrasound assisted were 47% and 51% respectively. The reaction time to achieve the maximum was shortened to 5 hours from 8 and more oil was extracted in the early phase of extraction. The oil extracted by ultrasound assisted methods was found not to have free fatty acids (FFA) content. This use of ultrasound is suitable to be used in a alrger scale.