The present study investigates attitudes towards aspects of health promotion in mental health services, as rated by patients and staff. The aim of the study was to investigate similarities and differences in attitudes towards health promotion interventions among patients and staff in mental health services, using a newly developed questionnaire, the Health Promotion Intervention Questionnaire (HPIQ). The study has a cross-sectional design and a sample of 141 patients and 140 staff were recruited to the study. The response rate was 59% for the patients and 50% for the staff. The participants were asked to rate the attitudes of the 19 items included in the HPIQ. The result showed that patients and staff in some cases share similar attitudes regarding aspects of health promotion intervention. According to both groups, empowerment is the most important intervention in health promotion. Significant differences between the ratings of patients and staff appeared regarding all subscales of HPIQ. Patients rated alliance and educational support significantly higher than staff and staff-rated empowerment and practical support significantly higher than patients. Based on these findings, it is of importance to meet patients' desire for information and knowledge in an interactive manner with an empowerment approach to promote health in mental health services.