There is a growing recognition of the need for health promotion interventions in all health care today. In spite of this, health promotion interventions among patients with mental illnesses have been scarce in research, practice, and policies. There is also an ambiguous interpretation of the definition of health promotion in the literature. The emphasis in this paper is thus to (1) discuss why we should pay attention to the interpretations of the concept of health promotion and (2) present a possible model for what nurses do when they intend to promote health in mental health care. This paper was presented at the Nordic Conference of Mental Health Nursing in Helsinki, Finland in 2010.