This article presents the "Montreal model", offering the patient, if he wishes, to become a patient partner for all the decisions that concerns him. We are presently witnessing, presently, major transformations in western societies. Chronic diseases affect a growing proportion of the population, leading a transition from the ascendancy of acute care to an ascendancy of chronic care. Other societal factors such as the consumerism, the individualism, the democratization of the medical information (accelerated by the advent of Internet) and the casualization of a growing part of citizens influence this evolution. In this context, where the nature and the level of patients and their families needs are changing as their expectations towards healthcare systems, one of the promising ways to answer these stakes is a greater participation of patients in their own care. Since 2010, a new relational model, based on the partnership of care between patients and healthcare professionals, was developed in the medicine Faculty of the University of Montreal. This model leans on the recognition of the experiential knowledge of the patients in complementarity with the scientific knowledge of the healthcare professionals. It's the continuity of the participation and the engagement of patients which can be applied to the whole healthcare system, in individual or collective relationship in interdisciplinary. This model is presently in implementation phase in Quebec in the training of the healthcare professionals, in healthcare organisations, as well as in the medical education and in research.