The aim of this study was to examine factors that may have an influence on the collaboration between the health-care professionals in a psychiatric hospital and two communities' psychiatric health service departments. Interviews were conducted with three psychiatric nurses, one medical practitioner, one health and social manager and one cultural worker; thus a total of nine informants. The transcribed interview texts were analysed by means of qualitative content analysis. The main results showed that the community psychiatric nurses felt a need for more systematic interdisciplinary collaboration. The existing collaboration was characterized by ad hoc meetings. In addition, the need for information about their colleagues' professional competence was reported. The respondents called for a more regular forum for professional guidance and coordination in relation to particular client cases in order to improve the quality of psychiatric care. There was also a need for collaboration within community health care and a link to psychiatric hospital care in order to better evaluate the outcomes of care provided. In conclusion, the lack of continuity in the collaboration between health-care professionals may affect the quality of community health services because continuity is a vital component of care.