An analysis of heterosis and combining ability of traits related with per plant production was carried out using a diallel crossing between different tomato cultivars, Lycopersicon esculentum Mill (six parents and 15 F, hybrids from all possible crossing in one direction), according to the methodology proposed by Griffing (1956), selecting experimental method 2, and model 1. In the genetic variation of all traits related to per plant production, the general combining ability (addite gene action) and specific combining abilyty (non-aditive gene action) effects participate jointly and in high1y significant manner. Hybrids Motelle x Angela I 5200, Motelle x Zarnbao y Licapal 21 x Zarnbao, exhibited high s.c.a. effects for the trait per plant production. Former effects related to high heterosis make these hybrids promising for later marketing.