Abstract:Objective: To study the chemical constituents of the volatile oil from the aerial parts of Isodon eriocalyx, var.laxiflora,. Method: The oil was obtained by hydrodistillation. The chemical compositions were separated and identified by GC-MS. The relative contents in the oil were determined by area normalization. Result: 163 peaks were separated and 105 compounds were identified, constituting 85.68% of the total peak area. Conclusion: 105 compounds characterized by GC-MS analysis were found from I. eriocalyx var.laxiflora for the first time.