Abstract: Chemical composition of the essential oil of the Prangos acaulis was extracted by Hydrodistillation (HD) and Supercritical Fluid Extraction (SFE) methods from aerial parts at full flowering stage. Their compositions were identified using GC/MS as the method of analysis. The analyses reveal that samples differ quantitatively and qualitatively. A total of 21 compounds constituting 89.1% of aerial parts oil were in SFE method. The oil obtained by SFE was under condition: pressure 120 bar, temperature 45°C and extraction time 45 min. On the other hand, 26 compounds constituting 98.74% of oil were in HD method. In according to our results, in both extracts, the two compounds present in the biggest quantity were: α-pinene (13.7 versus 22.87% in the SFE and HD oil, respectively) and 3-ethylidene-2-methyl-1-hexen-4-yne (14.3 versus 21.36%).