 High demands put on workers nowadays have contributed for an increase on the vulnerability and the stress levels, with severe consequences for the health Sandim, 2008. One of the main health conditions today is the Burnout Syndrome - or professional exhaustion Salanova and Llorens, 2008, with harmful consequences for individuals and organizations. The level of dedication to the tasks in which the frustrations are faced more strongly can determine what type of burnout would be developed frenetic, under-challenged or worn-out, affecting the health condition. In late 1970s, mindfulness began to be studied as a behavioral intervention in mental health. Current evidence suggests that the state mental trait mindfulness is positively associated with a variety of mental health indicators. The potential applicability of mindfulness in health services is great. Besides the effects for patients, health professionals also can have benefits. The consensus is that a greater number of mental health interventions need to be evaluated and implemented and it is possible that mindfulness can fit this need as a new technology in health care. There is a gap in the literature on the relationship of different clinical types of burnout and its association with different psychological constructs related to health, particularly in relation to the mental state of mindfulness and, in particular , addressing health professionals. Better understand this association will enable the improvement of existing and development of new interventions, geared to the specific needs of the population of health professionals, especially for professionals of Primary Health Care PHC , the object of this study. Thus, the general objective of this study is to assess the effect of a mindfulness-based intervention for primary health care professionals in the city of Porto Alegre, evaluating the behavior of a questionnaire for clinical subtypes of burnout BCSQ -36, other variables of psychological well -being, depression and anxiety symptons, activity and sleep patterns, measuring before and after the intervention, from a randomized controlled trial. 