This study was carried out to search the natural antioxidants from the 36 medicinal plants. $IC_{50}$ values of linoleic acid peroxidation inhibition to the BHA, BHT and ${alpha}-tocopherol$ showed $7.2{mu}g/ml$, $7.3{mu}g/ml$, and $26.6{mu}g/ml$, but hexane extract of Zingiber officinale showed $13.2{mu}g/ml$, EtOAc extracts of Phellinus linteus, Morus alba, Zingiber officinale and butanol extract of Diospyros kaki showed $15.9{mu}g/ml$, $16.9{mu}g/ml$, $20.1{mu}g/ml$, and $21.5{mu}g/ml$ respectively. $IC_{50}$ values of DPPH radical scavenging activity of BHA, BHT and $alpha$-tocopherol showed $14.9{sim}27.7{mu}g/ml$, but EtOAc extract of Paeonia suffruticosa showed the lowest $6.5{mu}g/ml$ than those of other extracts, EtOAc extracts of Camellia sinensis, Salvia miltiorrhiz, and Phellinus linteus showed $8.0{mu}g/ml$, $11.5{mu}g/ml$, and $13.0{mu}g/ml$ respectively.