Common goals for research and service in dual diagnosis are identified. Three major barriers to the integration of research and service are explored: (a) differences in culture, (b) negative history, and (c) competition for limited resources. Applied research concerning diagnosis, treatment, behavioral recording, and organization and management development can encourage greater cooperation. To promote the integration of the research and service, joint conferences and publications are recommended as well as graduate training programs and agencies that emphasize both research and service. A vigorous policy initiative is needed to obtain private and public support for integrating research and service in dual diagnosis.