In this study, the chemical compositions of the leaves, berries and twigs essential oils of J. oxycedrus L. subsp. oxycedrus, collected in Turkey, were determined. The oils were analyzed by GC and GC-MS. 15-21 volatile compounds were identified of the leaves, berries and twigs essential oils representing 82.4-98.0% of the total oils. The essential oils were obtained from leaves, berries and twigs by yielding 0.02%, 2.12% and 0.01%, resp. The major compounds were determined manoyl oxide (32.8%) and caryophyllene oxide (11.9%) in leaf oil, myrcene (44.6%), alpha-pinene (19.9%) and germacrene D (15.5%) in berry oil, manoyl oxide (35.4%) and caryophyllene oxide (16.8%) in twig oil.