Abstract The essential oil obtained from the branches and leaves of Atalantia roxburghiana Hook f. (Rutaceae) has been analyzed by GC and GC/MS. Forty-three components of the essential oil, representing 98.6% of the total amount of the oil, were identified. The main constituents were monoterpene hydrocarbons: Î³-terpinene (38.3%), p-cymene (15.7-%), Î²-pinene (5.2%) and Î±-pinene (4.7%). A comparison between constituents of the branch and leaf oil with the ones reported in the literature for other Atalantia ssp. is pointed out and some chemotaxonomical considerations have been provided.