The Burnout syndrome (BS) is a specific type of labor stress suffered by health professionals. The objective of this study was to define the prevalence of BS in the personnel of the ER of the Hospital de Niños "Superiora Sor María Ludovica", La Plata, Argentina. The questionnaire of Maslach (MBI) was applied during October-December, 2006, resulting in that 12,5% of the personnel, only medical doctors, presented SB. The arms of the test showed additionally that Reduced personal accomplishment was found in 60% of personnel, emotional fatigue in 52%, and despersonalización in 31%. More than 50% of the workers showed pathological results in 2 dimensions of the syndrome. It is concluded that working in an ER can end in a SB. It is suggested that prevention through modifications in the working conditions may be of help.