Phytochemicals are dependable sources for the treatment of different health problems. In this study, antioxidant activities of different sequential extracts (petroleum ether, benzene, chloroform, ethyl acetate, ethanol and aqueous) of root and inflorescences of Achyranthes aspera Linn. (Family: Amaranthaceae) was done by different standard methods of phytochemical screening. Our finding reveals that all the extracts of A. aspera root and inflorescences contain alkaloids, tannins, cardiac glycosides, steroids, flavonoids, terpenoids, reducing sugar and saponin in appreciable, moderate and trace amount. Observed result showed that the phytochemical contents are high in different sequential extracts of root than sequential extracts of inflorescences. Due to rich source of phytochemicals, this plant is may be used for herbal medicine.