Abstract: To analysize the chemical constituents of the essential oil from different parts(organs) of Chimonanthus nitens Oliv.distributed in Guizhou province.Essential oil was obtained by steam distillation from the root,stem,leaves and pericarp of Chimonanthus nitens.The chemical constituents were identified by GC-MS method,and the relative content of each constituent determined by area normalization.Seventy-six components were identified and 8 compounds were coexisted in the root,stem,leaves and pericarp,which took up 43.08%,7.87%,57.55% and 66.72% ratio of the essential oil of each organ,respectively.1,8-Cineole,erpinene-4-ol and linayl propionate were found to be the major constituent in the root essential oil,while elemol and β-eudesmol in the leaves essential oil, borneol ,1,8-Cineole and α-cadinol in stem essential oil and caryophyllene oxide and humulene epoxide in the pericarp essential oil.The results showed that stem and pericarp contained almost same essential chemical constituents but were different from those of root and leaf.