The definition of burn-out the most often cited and proposed by Maslach and Jackson, clarifies the three cardinal symptoms affecting doctors, namely, emotional exhaustion, with depersonalization of their patients and reduction of the feeling of personal accomplishment. The causes of this phenomenon are relatively well-known: individual psychological factors, stressful factors intrinsic to the medical practice and finally extrinsic factors related to the professional environment and its organization. The purpose of this review is to estimate the prevalence of burnout within the population of Belgian family physicians and to understand both individual and societal consequences. About the method. This is a literature review using databases Medline, Cochrane Library, and the American Psychological Association from 2000 to 2011 with the keywords: primary health care, family practice, burnout, emotional exhaustion, psychological stressors, distress, fatigue, depersonalization, substance and alcohol abuse, depression, well-being, quality of life, job satisfaction, professional efficiency, patient care, physician-patient relations, medical errors, quality of health care, pharmaceutical/health expenditure/statistics-numerical data, obstacles to prevention, health system assessment, medical demography. Selecting of the most relevant articles through the reading of abstracts and then full text reading of 49 selected articles. In conclusion, the exact prevalence of burn-out amongst Belgian general practitioners is not known. From some works, it is estimated that about half of them would be achieved at least in terms of emotional exhaustion. The symptoms related to burn-out are potentially serious: ea depression, alcohol and tobacco abuse and cardiovascular complications. There are also arguments demonstrating the fact that this disorder amongst general practitioners influences negatively the quality of care, their cost, but also medical demography of primary care with as a corollary a questioning of the viability of the ...