Lemongrass is an aromatic grass belonging to the family of Gramineae and genus of Cymbopogon. There are two main type of lemongrass species, namely: Cymbopogon citratus, the kind often found in Indonesia; and Cymbopogon flexuosus (Jayasinha, 1999). Lemongrass is well known for its essential oil and it is one of the world’s best essential oil. The essential oils possess many uses including perfumery, cosmetics, pharmaceutical and flavoring industries. Citral, a monoterpene, is a major constituent of lemongrass essential oil. It was known to posses antiseptic, antimicrobial, anti-inflammatory, carminative, diuretic and central nervous system stimulating effects (Carbajal, et al, 1989). Citral possesses ant-oxidant activities which may be associated with some of the reputed beneficial effects on human health (Cheel, et al., 2005) The aim of this study was, to analyze the composition of bioactive components of the essential oil of lemongrass leaf and stalk, and to evaluate their antioxidant capacity.