Jatropha curcas has a variety of uses which are great economic significance. Jatropha oil can be used as fuel alternative and for making biodiesel that is supposed to overcome the source limitation problem. In this paper, conventional and ultrasound assisted solid liquid extraction of Jatropha seed were studied in terms of amount and quality of the extracted oil. The free fatty acid content which is an important oil quality index was also investigated for the obtained oil. Both ultrasonication and microwave pretreatment of the seed had a positive effect on amount of yield. With the application of ultrasound, more oil could be extracted compared with that obtained by conventional method. The maximum amount of oil which could be extracted by conventional and ultrasound assisted were 47 and 51 respectively. Regarding the quality, oil extracted by conventional and ultrasound assisted methods did not show any significant difference in terms of free fatty acids (FFA) content. The use of ultrasound as assistance to improve oil yield is practical and more suitable to be used at larger scale.