The present investigation on Indian mustard was comprised of a half diallel set of 5 parents and their 10 crosses. Three cross combinations exhibited positive significant heterobeltiosis for seed yield/plant. On the basis of per se performance and estimates of heterosis, the cross IC-342777 × IC-339953 found to be most promising for seed yield/plant. GCA effects revealed that IC-335858 followed by IC-355856 having significant and positive GCA effects was found to be the best combiner for most of the yield contributing traits and on the basis of SCA, IC-342777 × IC-339953 and IC-342777 × IC-355856 was recorded best specific combination for most of the yield contributing traits. It may be concluded that IC-355856 is a good general combiner and IC-342777 × IC-355856 is a best specific combination for higher yield.