The nature and magnitude of heterosis over better parent (heterobiltiosis) and over standard variety (Economic heterosis) in rice was studied using 60 F₁ hybrids involving 30 lines and 2 testers in a line x tester analysis. A total of 60F1s, their 32 parents (30 males + 2 females) and a standard check. Sarjoo-52, were evaluated. The findings indicated that, the heterosis over better parent was 30.56 percent and 70.67 percent over standard parent for panicle length; 14.62 per cent over better parent and 11.07 per cent over standard parent for total number of spikelets panicle^-1; 54.73 per cent over better parent and 11.86 over standard variety for number of sterile spikelets panicle^-1 42.48 per cent over better parent and non of the crosses showed economic heterosis for 1000 grain weight and 139.43 per cent over better parent and 22.64 per cent over standard parent heterosis recorded for grain yield plant^-1.