Abstract: Four rose oils from France, Morocco, Kushui in Gansu Province and Pingyin in Shangdong Province were analyzed qualitatively and quantitatively by means of GC and GC / MS. 79, 74, 45, 54 compounds were respectively identified in these four rose oils. The main chemical constituents of all the rose oils are citronellol, geraniol jS-phenylethyl alcohol, farnesol and their esters, linalool, linalool oxide, rose oxide, eugenol, methyl eugenol and others. Because of different constitutents and their contents, the odour among the oils are different delicately. French rose oil and Moroccan rose oil possess unadulterated, sweet, fresh floral rose odour with green note because of the suitable proportion of their aromatic constituents, but Kushui rose oil and Pingyin rose oil possess less floral odour with slight other odour because of unsatisfying pro-portion of their constituents, and also Kushui rose oil possesses a little fatty odour because of the higher content of 2-dodecanone and 2-tridecanone.

Key words: Rosa