The leaves of Abrus precatorius Linn. were extracted with methanol and chemical subsatnces were isolated by using chromatographic and crystallization techniques. A flavonoid glycoside was isolated and identified as hemiphloin or 6-C-glucosylnaringenin, which has never been reported to be found in this species or family before. Another chemical substance which was isolated from the hydrolysed crude extracts is proved to be triterpenoid sapogenin of 12-oleanene type, called abrusleactone A. This triterpenoid was reported to be isolated from the roots and vines of Abrus precatorius.