The common bean (Phaseolus vulgaris L.) has high nutritional value, with significant concentrations of protein and minerals. It represents the main source of protein for low income populations, especially in developing countries. The identification of lines with high levels of protein and minerals, adds value to the cultivars, without increasing the cost to consumers. Thus, breeding programs should be to associate great agronomic performance and nutritional quality in lines. Therefore, this study has as objective to evaluate the genetic variability for protein and minerals content of 100 common beans lines belonging to germplasm bank at Universidade Federal de Lavras (UFLA).