The issues of physical, mental and sexual development of the child, anatomical and physiological features of the child's body, modern ideas about feeding newborns and children of the first years of life are covered. The diseases of the child's body, care for them, medical care for urgent conditions are described; the work of children's medical institutions; hygienic and anti-epidemic requirements for them; the duties of a nurse and the peculiarities of her work in specialized departments, the correct maintenance of medical records; medical and psychological problems that arise when working with children and their parents. For students of medical schools and colleges, middle medical workers.