Therapeutic patient education is a patient-centred approach, focussed on patients' needs, resources, values and strategies. It allows patients to improve their knowledge and skills not only concerning their illness but also their treatment. It brings a better quality of life, a greater therapeutic compliance and a reduction in complications. The most difficult part of therapeutic patient education occurs when patients must change their behaviour. Motivational interviewing and cognitive-behavioural approaches contribute greatly here and allow both the preparation and support of patients during progressive 'step by step' change. The work on resistance to change is fundamental, and ambivalence when faced with the choice of a new way of life must be measured, discussed and negotiated. Patients become partners and we become 'coaches'. The negotiation of objectives must allow patients to choose their own strategies, which normally should cost them the least possible, psychologically, and bring them the maximum benefit.The efficiency of therapeutic patient education no longer needs to be proved: 80% less amputations over 10 years in diabetic patients; 50% maintenance of weight loss over 5 years, etc.In conclusion, therapeutic education is part of a humanistic medical approach centred on patients; it allows them to be active participants in their own treatment with the aim of improving their quality of life and therapeutic compliance, as well as reducing potential complications. Thus, health care professionals teach, inform, train, negotiate with, motivate and accompany patients in the long-term follow-up of their illness.