The aim of this study was to determine socio economic, health status, nutritional and behavioral differences in obese, overweight and normal weight children attending first grade elementary school. In overweight group there is 13.8% of boys and 12.6% of girls, in obese group 8.3% of boys and 6.9% of girls. In factor analysis 12 factors was excluded with cumulative loading of 60% variability. Discriminant analysis was performed with 12 factors as predictive variables and discriminant variables were three BMI groups: normal weight, overweight and obese. Function 1 discriminate well normal weight group from overweight and obese group. Overweight and obese groups is described with lower number of children in the family and lower order of birth, higher education of parents, they eat less vegetables and fruits, spend more time playing computer games, have less physical activity, drink more alcohol with their meals, exactly opposite to normal weight group.