The highest percentage of the oil i.e. 58.3% was found in the seeds (Kernel) collected from Rolpa district. The physico-chemical parameters like moisture content, oil content, specific gravity, density, viscosity, refractive index, iodine value, saponification value and acid value (% Free Fatty Acid), were determined. Then extracted oil was converted into biodiesel by transesterification process with methanol using different concentration of alkali catalyst viz. 0.5%, 1.0% and 1.5% NaOH. The result showed that 1% NaOH catalyst was found to be the most effective concentration producing 87% crude fatty acid methyl esters (FAME) and 10% crude glycerol. Composition of FAME present in the biodiesel was identified by GC-MS method. [ABSTRACT FROM AUTHOR]