Introduction & Aim: Plant growth regulators (PGR) have same effect as natural plant's hormones and can change the main components in plant samples. Chaerophyllum aureum L. is related to Apiaceae family.Experimental: In this paper the qualitative and quantitative composition of the volatile oils of ‎Chaerophyllum aureum L. were reported after using different concentrations of IAA and NAA ‎on aerial parts of the plant at flowering time. The essence was recovered by using ‎hydro-distillation with a Clevenger type apparatus and investigated by GC and GC/MS.‎Results & Discussion: The main components in the control sample are: α-pinene (14.1%), β-pinene (11.2%), ‎camphene (7.3%), verbenone (2.3%), limonene (14.4%), and trans-verbenol (3.7%). The results ‎indicated that IAA will result in the percentage increase of germacrene-D and, ‎of α-humulene (about 4%) and, decrease of α-pinene and β-pinene. NAA will result in the ‎production of β-bisabolene (2.5%), the increment of α-cadinol about 2 times, the diminution ‎of camphene (less than half) and of α-pinene and β-pinene too.‎ تفاصيل المقالة