Objectives To determine the frequency, dynamics in the incidence and paek age of occurance of eating disorders and obesity in children during puberty and adolescence who were treated at pediatric department. Also, to determine the gender distribution of these disorders and impact of family history of obesity on the prevalence of obesity in children. Patients and methods We conducted a retrospective descriptive study in the Pediatric department of Clinical Hospital Split from January 1st, 2009 to December 31st, 2013 on 159 children, 20 children treated for eating disorders and 139 treated for obesity. The study included children aged 9 to 18 years old with discharge diagnosis of eating disorders and obesity. Analyzed data were collected from patient`s medical history. Results Children with eating disorders make 0,36% of hospitalized children during puberty and adolescence. Children with obesity make 2,48% of hospitalized children during puberty and adolescence. Dynamics in the incidence of eating disorders shows a tendency to increase of 900%, while obesity has tendency to decrease of 23% in the observed group trough 5 years. Gender distribution indicates that 85% of patients treated for eating disorders were females and 15% were males; 47% of patients treated for obesity were females and 53% were males. Peak age of occurance of eating disorders and obesity was identical, and is the largest in 14th year of life. 29% of obese children had a family history of obesity. Conclusion Eating disorders and obesity constitute a small percentage among hospitalized children in the Pediatric department. Eating disorders tend to increase in frequency, the frequency of obesity tend to fall. Eating disorders occur mostly in females, and obesity is only slightly more common in males. Peak age of occurance was identical for these two diseases, and is 14 years. Approximately one-third of obese children has a family history of obesity.