The present study used the recommendations of the World Health Organization to measure nutritional status, doing so through the body mass index. The purpose of the study is to relate the nutritional status of kindergarten and first grade students from two municipal schools in the Maule region with the eating habits and physical activity perceived by the parents. 87 kindergarten and first grade students were evaluated. The results show that in kindergarten overweight and obesity reached (76.2%) respectively, and in first grade an overweight and obesity of (70.6%), however, no greater relationship was found between knowledge of the parents of the importance of physical activity in the life of their children and their nutritional status as well as in the eating habits that they reported of their children in relation to nutritional status. Students are in a nutritional state of risk and the perception of parents is low in terms of the knowledge they have regarding the practice of physical activity and eating habits, being directly related to the poor nutritional status that they present.