In the present study, we investigated the antioxidant activity of methanol extract and its organic fractions (n-hexane, $CH_2Cl_2$, EtOAc, n-BuOH and $H_2O$) of Capsiccum annuum leaves against 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical. As results, methanol extract, and its ethyl acetate and n-butanol fractions showed good scavenging effect at 100 ${mu}g/ml$. Four compounds were isolated from the ethyl acetate fraction through silica gel and Sephadex LH-20 column chromatographies. Their chemical structures were elucidated as apigenin (1), vanillic acid (2), uracil (3) and apigenin $7-O-{eta}-D-apiofuranosyl(1{ ightarrow}2)-{eta}-D-glucopyranoside$ (4) by comparison of spectral data with those in reference. $IC_{50}$ value of compound 2 was 14.7 ${mu}g/ml$, while compounds 1, 3 and 4 had no effect on the DPPH radical.