The aim of this work was the comparison of the degree of spreading of incorrect nutritional model among students and secondary school pupils. There were 1080 persons included in the examination: 637 students of Collegium Medicum of Jagiellonian University (478 female students and 159 male students) and 421 of Cracow secondary school pupils (254 schoolgirls and 167 schoolboys). The examinations were based on the Woman Self Image and Social Ideal questionnaire and precisely on its part containing Eating Disorders Inventory (EDI). BMI (Body Mass Index) was used as the indicator of the nutritional status. BMI < 18.5 were more often stated by women (27.6% of schoolgirls and 12.5% of female students) than by men (both schoolboys and male students--6.5%). Overweight (BMI >25) was stated by 2.8 of schoolgirls and 8.8% of female students and by 6.6% of schoolboys and 15.7% of male students. The answers given in the questionnaire by schoolchildren and students lead to the conclusion that schoolchildren are more imperilled by eating disorders than students. More or less 20% of schoolchildren with BMI <20 kg/m2 is not satisfied with their body shape. In spite of too low body mass they think that they have too big stomach, too fat hips and thighs and are eager to lose weight.