Water deficit is known to improve fleshy fruit quality at the expense of yield. However in tornato, recent studies showed that such effects are highly dependent on genotypes. Thus, breeding tomato plants adapted to grow under limited water supply requires a better understanding of the effects of WD on fruit quality and their genetic variability. ln the present work, four experiments have been performed under greenhouse conditions on the 8 parents of the Multi-Parent Advanced Generation Inter-Cross population which offers the largest allelic variability observed in tomato. Moderate and intensive WDs have been applied during the whole period of fruit development The experiments were performed either in spring or in autumn to analyze the interactions between WD and season. Moreover, interaction between moderate WD and plant fruit load was measured in spring. Fruit quality was assessed through fresh and dry masses, and fruit composition (soluble sugars, organic acids, vitamin C, carotenoids). Results show that fruit fresh mass is reduced p,roportionally to WD intensity, whereas the % dry mass is increased. Big fruit size genotypes are much more sensitive to WD than small fruit size genotypes. The improvement of fruit taste, based on the increase of the sugar:acid ratio, resulted more from concentration effects than from metabolic trigger effects. Trade-offs between fruit size decrease and quality improvement allowed discriminating the 8 accessions for their genetic interest under water limited conditions.