670 students, of 3rd, 5th and 7th grade, were examined. 50,6% were boys, 526(78,51%) healthy (3<PB<90), that is well nourished students, (257-38,36%) boys and (269-40,15%) girls. There is statistically significant frequency of normally nourished children of 3rd, 5th and 7th grade in comparison to the whole frequency of appearing of the numbered eating disorders (p<0,001). Undernourished (PB) were 18 students (2,68%), 9 boys (1,34%) and 9 girls (1,34%). Malnutrition is statistically the least frequent eating disorder with children of 3rd, 5th and 7th grade. Pre-obese (90<PB<97) were 92 students (13,73%), where 47 were boys (7,01%) and 45 were girls (6,72%). Pre-obesity is statistically the most frequent eating disorder among children of 3rd, 5th and 7th grade (p<0,05). 34 students (5,07%) were diagnosed with obesity, 26 (3,88%) boys and 8 (1,19%) girls. Statistically the obesity appears more often with boys than with girls of the same age (p<0,001). In general the least manifested eating disorder with students of 3rd, 5th and 7th grade, but also in each class separately, is undernourishment, which appears with the same frequency both with boys and girls. Generally the most manifested disorder in nourishment with students of 3rd, 5th and 7th grade, but also in each class separately, is pre-obesity which appears with the same frequency both with boys and girls. The level of obesity is the highest with the students of 3rd grade, and the lowest with the students of 5th grade.

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