Abstract: Realizing the potential of hybrid rice to increase productivity, the present experiment was undertaken with a fixed model i.e. line x tester mating design involving 3 CMS lines and 20 elite restorers to identify the best heterotic combination. The results indicated that the manifestation of heterobeltiosis for grain yield was significantly superiority of 43 hybrids ranging from 11.63 to 113.04% and 46 hybrids over standard variety (Sarjoo-52) ranging from 10.48 to 71.56%. Most of the crosses which exhibited superiority over better parent or standard variety for grain yield also showed significant heterosis for number of fertile spikelets and number of spikelets per panicle. These crosses also possessed about 80% pollen viability. Besides grain yield, considerable heterosis was observed for other characters also but its degree varied from character to character. The best cross combination in order of merit grain yield and other yield components were IR58025AxIR48749-53-2-2-2R, NMS4AxIR633-76-1R, IR58025AxIR54853-43-1-3R, IR58025AxIR19058-107-1R and PMS10AxIR54853-43-1-3R. Considering the heterosis more than 60% as well as significant sca effects for major components, the NMS4AxIR633-76-1R, IR58025AxIR19058-107-1R and IR58025AxIR32419-28-3-1-3R were most promising combinations and need to be tested on large scale. Besides these, some other crosses viz., NMS4AxIR52256-9-2-2-1R, NMS4AxIET 9352 and IR58025AxIET201102, which expressed more than 50% heterosis along with desirable significant sca effects for more than six important yield components, may be considered for commercial exploitation.