Abstract: The essential constituents from Mimosa pudica L. were extracted by steam distillition method and the obtained essential oil were analyzed by gas chromatography-mass spectrometry (GC/MS). Fourty-one peaks were separated and 34 components were identified, which represented 89.01% of the total peak area. The main components were N,N-diphenylhydrazinecarboxamide, bis(2-methylpropyl) 1,2-benzenedicarboxylate, butyl-2-methylpropyl 1,2-benzenedicarboxylate, nonadecane, 1H-lndole-3-ethanol, tetracosane, phenol, 2,4-bis(1-phenylethyl), hexacosane, heptacosane, etc.