Nutritional and anthropometric study of 400 children between 3 and 72 months of age living in urban Caceres, Polonoroeste area, MT. Diarrhea was also studied. Nutrition was evaluated according the criteria of GOMEZ and WATERLOW. According to GOMEZ 33% of the children were undernourished and 36% of them it preceeded the time of inquire. Forty seven percent of the undernourished children referred diarrhea and the correlation between diarrhea and undernutrition was significant.