-This study describes a preliminary evaluation of the anti-inflammatory activity of Castanopsis cuspidata extracts. C. cuspidata was extracted using 80% ethanol and then fractionated sequentially with n-hexane, dichloromethane, ethylacetate, and butanol. To screen for anti-inflammatory agents effectively, we first examined the inhibitory effect of the C. cuspidata extracts on the production of pro-inflammatory factors and cytokines stimulated with lipopolysaccharide. In addition, we examined the inhibitory effect of C. cuspidata extracts on pro-inflammatory mediators (NO, iNOS, COX-2) in murine macrophage RAW 264.7 cells. The amounts of protein levels were determined by immunoblotting. Of the sequential solvent fractions of C. cuspidata, the n-hexane, dichloromethane and ethylacetate fractions inhibited the mRNA expression of pro-inflammatory cytokines (IL-1β and IL-6), production of NO, and the protein level of iNOS and COX-2. These results suggest that C. cuspidata may have significant effects on inflammatory factors and may be provided as a possible anti-inflammatory therapeutic plant.