The mortality rate among 1,490 children, aged zero to fourteen years, hospitalized in the Burns Unit of Departament of Plastic Surgery in Ciudad Sanitaria de la Seguridad Social de Sevilla is studied. Analysis determined death probabilities for each case according to percentage of burned surface and age, and also LD50 in different age groups. The mortality analysis showed lethal factors related with primary care and evacuation, responsible for a decrease in survival probabilities of the children. Children with severe burns must be hospitalized in special units, which must have a high level of training in hydroelectrolitics disturbances and surgical management of this type of patients, who require homo or xenografts frequently.