Abstract The essential oils obtained from the dried leaves, flowers, stem and root of Phlomis olivieri Benth. (Labiatae) were analyzed using GC and GC/MS. Thirteen components were identified in the oil of leaf with germacrene D (58%), α-pinene (10.4%) and bicyclogermacrene (4.4%) as main constituents. Ten compounds were identified in the oil of flowers with germacrene D (48%), α-pinene (19.7%) and β-selinene (10.1%) as main components. Ten compounds were characterized in the oil of stem with germacrene D (57%), α-pinene (8.6%) and 2-pentadecanone (6.5%) as main constituents. In the oil of root, germacrene D (35%), α-pinene (12.6%) and spathulenol (6.6%) were found as main constituents. All oils consist of monoterpenes, sesquiterpenes and aliphatic compounds.