Objective: To study the effect of plant flavonoid apigenin on NO production in chondrocytes induced by IL1 and LPS. Methods: IL1 and LPS induced NO production in rabbit chondrocytes. NnitroLarginine, a competitive NOS inhibitor was taken as control. The inhibitory effect of apigenin on NO production was observed. Results and Conclusion: Apigenin (3.125 ̄25 mol/L) dosedependently inhibited NO production, its effect is more intense than that of NnitroLarginines.