Objective To analyze the chemical components of essential oils extracted from the leaves and seeds of Myristica fragrans Houtt and to provide references for resource utilization and qualities control. Methods The essential oil was extracted by steam distillation and separated with GC capillary column. The relative content of every compound was determined by normalization method and the chemical compositions were analyzed by GC-MS. Result The volatile oil content of leaves was lower than that of seeds. Forty-six compounds in leaves and forty-one in seeds were identified. The essential oil compounds of leaves and seeds were mainly monoter- penoids and aromatic. Conclusion The results showed that constituents of the oik in the leaves were basically similar to those of the seeds, but the relative contents of the oils were different from each other. The leaves had the important applied value for product development.1 :