Objectives: The aim of the research is to investigate if there is a higher prevalence of physical comorbidities in children with psychiatric disorder in comparison to children who do not have a psychiatric diagnosis. Materials and methods: The study involved 60 participants. The test group consisted of children who came for psychiatric examination or treatment at the Children's and Adolescent Psychiatry Clinic, Clinical Hospital Center Split, in the period from February 1 to June 31, 2024. The control group consisted of children who attended the fifth to eighth grade of elementary school. Participants were students from Prof. Filip Lukas Elementary School in Kaštel Stari and Vjekoslav Parać Elementary School in Vranjic, with parental consent. The exclusion criterion for the control group was current or past visits to a psychologist or psychiatrist. The BAI and CDI questionnaires, measurement scales for anxiety and depression, and a survey on physical illnesses and sociodemographic parameters were conducted. The BAI questionnaire contains 21 questions about anxiety symptoms over the past week, the CDI questionnaire contains 27 questions about depressive symptoms, and the physical illness survey contains questions about physical illnesses, medications, hospital treatment, and sociodemographic parameters.Results: The frequency of physical illnesses in the examined group was significantly higher than in the control group (63.3% vs. 16.7%, P=0.001). The most common physical illnesses were allergic rhinitis, gastritis, or allergies. In the last month, 30% of children from the examined group visited their family doctor compared to 10% of children from the control group. The frequency and duration of previous hospital treatments were 70% and one day of hospital treatment (0 - 3) in the examined group, compared to 73% and one day of hospital treatment (0.25 - 3) in the control group. When asked if they often feel sick, 8 (27%) children in the examined group responded affirmatively compared to 3 (10%) children in the control group. We demonstrated a statistically significant link between the severity of depressive and/or anxiety symptoms measured by scales and the number of physical illnesses, with a significant link between depressive symptoms and physical illnesses (P=0.020) and between anxiety symptoms and physical illnesses (P<0.001). Conclusions: The experimental group has a statistically proven higher frequency of physical comorbidities. There are no statistically significant differences between the groups in the frequency and duration of hospital treatment, the number of visits to the family doctor, or the feeling of frequent illness. We have also proven that the intensity of depressive and/or anxious feelings is associated with the number of physical illnesses.