Nelumbo nucifera (Nymphaeaceae) has been widely used in a traditional oriental medicine to treat bleeding, fever, diarrhea, hemorrhoid, sunstroke, dysentery and dizziness. The leaves of this plant were refluxed with methanol, and then fractionated with organic solvents to screen the antioxidant activity using DPPH radical. Ethyl acetate and n-butanol fractions showed good DPPH radical scavenging effects and were carried out column chromatographies to isolate nine compounds. Their chemical structures were characterized as p-hydroxybenzoic acid (1), uracil (2), luteolin (3), quercetin $3-O-{eta}-D-glucopyranoside$ (4), $rhamnetin 3-O-{eta}-D-glucopyranoside$ (5), $isorhamnetin 3-O-{eta}-D-glucopyranoside$ (6), $quercetin 3-O-{eta}-D-glucuropyranoside$ (7), $quercetin 3-O-{eta}β-D-xylofuranosyl(1{ ightarrow}2)-{eta}-D-galactopyranoside$ (8), and adenine (9) by comparison NMR spectral data and with those in references. Compounds 1, 2, 5 and 9 were firstly isolated from this plant. Compounds 1, 3 and 4 showed potent DPPH radical scavenging activity. Especially, compound 3, luteolin showed the higher effect than ascorbic acid used as a positive control.