The aim of this work is to discuss about the possibilities of a mental health definition from the perspective of the Latin American social medicine/collective health movement. Some relations between that movement and the mental health are pointed out. A historical analysis of that movement is presented. The conceptualizations of the health-sickness-care process are considered, emphasizing the complexity, rights perspective and the reference to life, in contrast with the objetivation/medicalization trend. Finally, these ideas are linked with the current debates on the Mental Health field.