Abstract : Scientific reports indicate that the progression of obesity is irremediable. It represents a considerable health risk for individuals and threatens our health system with collapse. This alarming fact has led the public authorities to tackle the problem head-on. In view of their central position in the care system, hospital is required to organize in order to respond to this veritable healthcare tsunami. The situation of hospital does, however, offer an astonishing contrast. The illness appears to be invisible in the healthcare services. In the field of eating disorders, obesity is not in the foreground. It is a “secondary” disease. Outside university hospitals, or specialized centers, it is only of concern to very few hospitals. In those establishments in which obesity has been given a high profile, though, the current hospital model, focused on rational healthcare, scientific progress and medical performance involving impressive technical platforms, is being shaken up. In a scenario of increased hospital work and of changes in funding mechanisms, dealing with obesity obliges these institutions to reflect on professional practices, opening up to their environment. New forms of cooperation are created with local agents who ensure the maintenance of social connections for obese patients and who help to prevent the disease from developing.