The article is concerned with problems of morbidity of children and infant mortality during the latest 30th years after Chernobyl catastrophe. The 30th anniversary of the Chornobyl disaster is a stage that determines the analysis of its consequences, the assessment of the effects of radiation, the impact of the accident factors on the health of the population of the most affected countries and on global processes. To study the condition of child population of regions of Ukraine, which were contaminated by radionuclides in the result of Chernobyl catastrophe. Statistic assessment and epidemiological analysis were used to analyze materials of the investigations. Results of comparative analysis demonstrate the stabile increase of morbidity level as residents of regions of TRC. Abnormalities of respiratory system present the first group of the morbidity among children. The morbidity level of blood and blood forming diseases, tumors formation, diseases of endocrine system, digestive disorders, metabolism disorders significantly increases. The level of child population morbidity after Chernobyl catastrophe increases in 3.2 times. Respiratory diseases are involved in the first place in this structure.