A 5 x 5 half diallel cross among some tomato (Lycopersicon esculentum Mill) cultivars was investigated with respect to fruit and yield characters. General combining ability(GCA) and specific combining ability (SCA) variance for the arrays and individual cross combination in the studied characters i.e, plant height, percentage of fruit set, fruit weight, fruit diameter, fruit height, early yield and total yield were calculated and discussed. Both GCA and SCA variance were significant for all characters.Apreponderance of variance due to GCA over SCA was observed for percent of fruit set fruit diameter, fruit height and fruit weight characters indicating the importance of additive gene action.While SCA variance was great in plant height,early yield and total yield chracters indicating nonadditive gene action playes important role in inheritance of these chracters.Cultivar Supermarmand prosses high GCA effect in most studied characters,while hybrids Pritchard x Super- marmand,Strain B x Cal Ace and Supermarmand x Cal Ace showed high SCA effect.