Abstract The oil obtained by hydrodistillation from the aerial parts of Teucrium multicaule Montbret Et Aucher Ex Bentham from Turkey was analyzed by GC and GC/MS. Fifty-six compounds were characterized, representing 90.0% of the total components detected. The major constituents were identified as germacrene D (13.2%), caryophyllene oxide (10.9%), spathulenol (6.6%), Î²-caryophyllene (5.6%), and (6Z,10Z)-pseudo phytol (4.1%). Key Word Index: Teucrium multicaule Lamiaceaeessential oilcompositiongermacrene Dcaryophyllene oxidespathulenolÎ²-caryophyllene