Objective: To study the antioxidant activity of essential oils of Lamtana camara. Method: The essential oils of L. camara were preparated into different doses (0.4

0.8

1.2

1.6

2.0 g·L-1) with 95% ethanol. And the antioxidant activities were studied using DPPH assay

ABTS+assay and reducing power assay. Result: The essential oils of L. camara possessed good scavenging activities on ABTS+radical (reaching to 52.50%)

but weak scavenging activities on DPPH radical (only reaching to 21.05%). Their reducing power activities were in the sequence of 2.0 g·L-1>1.6 g·L-1 > 1.2 g·L-1 > 0.8 g·L-1 > 0.4 g·L-1. Conclusion: The essential oils of L. camara showed good activities on both scavenging ABTS+radical and reducing power

but low activity on scavenging DPPH radical. All antioxidant activity showed a concentration-effect relationship. The essential oils can be employed as natural antioxidants and health care products.