he essential oils of three different parts (roots, leaves and fruits) of Diplotaenia cachrydifolia were investigated by GC/MS. The oil Yield of dried parts obtained by hydrodistillation were 0.33%, 1.67% and 2.9% (v/dw) respectively. Thirty-five compounds representing 92.7%, 97.9% and 97.7% ofthe root, leaf and fruit oils were identified, respectively. Major constituents of root oil were isomyristicin (21.4%), alpha-phellandrene (18.8%) phellandrene (9.8%), methyl Oleate (9.6%), beta-cymene (7.6%) and (E)-isodillapiole. However, the characteristic compounds of leaf and fruit oils were terpinolene (64.1%, 69.34%), (E)-dillapiole (17.59%, 7.7%), beta-phellandrene (4.5%. 67,0%) and(E)-beta-ocimene (2.3%, 3.8%), respectively. The oil constituents ofthe leaves and fruits were found to be similar. However, the amounts of isomyristicin alpha-phellaiidrene and methyloleate in the roots were higher than those of leaves and fruits.