Highly significant differences among populations of common bean from northwest of Iberian Peninsula were found for the most important physical and nutritional quality characters of the seed. Estimate of heritabilities in broad-sense for physical characters were high, except for tenderness (0.36), pointing up length (0.95), width (0.84) and tickness (0.84), wtaer absorption (0.86), dry weight (0.78) and tegument proportion (0.70). In general, the heritabilities in broad-sense for nutritional characters were low as crude protein (0.35). Correlations among physical characters were higher than among nutritional ones, pointing up the correlation between dry weight and length (0.74) and dry weight and width (0.55). It was important the correlation between width and thickness (0.51) too. These results should be taken into account in a breeding program with the main goal of genetic improvement of seed quality in common bean landraces, above all for the physical traits that have show high values of broad-sense heritability.Peer reviewed