Abstract The chemical composition of the leaf oils of Psidium cymosum Urb. and Psidium sartoranum Niedz. were studied by GC/MS. Thirty-three volatile compounds were identified in P. cymosum, of which T-cadinol (46.6%), 1,8-cineole (15.0%) and Î±-muurolol (11.8%) were the major ones. Twenty-one volatile compounds were identified in P. sartorianum, of which limonene (43.0%) and Î±-pinene (39.5%) were the major ones.