The damages in cells and in tissues are the inhibitors of most of diseases. Such damages are caused by free radical. Anticipation toward the formation of free radical in human body was conducted by consuming the antioxidant sources. One of natural compounds that is famous because it has activity as antioxidant is flavonoid. The main purpose of this research is to compare free radical scavenger activity of ether and water fraction of ethanol extract of Centella asiatica herbs.