We carried out the effect of Si levels (0.5, 1.0 and 2.0 mM) on ethylene and salicylic acid (SA) of hydroponically grown rice plants, after 6h, 12h and 24h of Si application. All samples were analyzed after applying wound stress for 30 minutes. In 6 h treatments, 0.5 and 1.0 mM of Si decreased ethylene production by 7% and 9.9% respectively, while elevated level of Si (2 mM) insignificantly affected ethylene production under same conditions. However 0.5 and 1 mM of Si enhanced endogenous SA contents by 2.6% and 17.3% respectively, while 2 mM of Si decreased SA contents by 3% as compared to control. Samples analyzed after 12h of 0.5, 1 mM and 2 mM Si application showed reduction of 11%, 4% and 1.7% respectively, while SA contents increased by 4% and 9.5% in 0.5 and 1 mM Si treatments. Samples analyzed after 24 h of Si treatment showed that 0.5 and 1.0 mM of Si inhibited ethylene production by 12.6% and 18.2% respectively, while 2 mM Si increased ethylene production by 11.9% as compared to control. It was observed that the SA content of rice was almost similar to control in 0.5 mM Si applied treatments, while 1 mM and 2 mM of Si increased SA contents by 6.5% and 6.9% as compared to control. It was concluded that Si alleviates the effect of wounding stress in rice by regulating ethylene and SA production.