The diallel analysis was done in eight lines of cherry tomato to study the combining ability and heterosis effects for growth, yield and quality traits. The lines found to be good general combiners were L 00427 for plant height DAT; L 00398 for number of fruits per cluster, number fruits per plant, fruit yield per plant and lycopene content; L 04780 for ascorbic acid; L 01696 for total soluble solids and reducing sugar. The best specific combiners for plant height L 04780 x L 03686 , the L 00427 x Arka Vikas is for number of fruits per cluster, number of fruits per plant and total soluble solids and the hybrids L 00427 x L 03686 , L 01696 x L 03686 for ascorbic acid and lycopene content respectively. Highly positive significant heterosis was observed for number fruits per plant (191.02), pericarp thickness (121.7%), number of fruit per cluster (64.4%) ascorbic acid (59.9%), total soluble solids (45.86%) over the better parents. Four hybrids possessed significantly useful heterobeltiosis for fruit weight.