Methods for promoting collaboration between clinical psychologists (CPs) and community-based self-help groups (SHGs) for cancer survivors were investigated from the perspective of community psychology. A semi-structured interview was administered to CPs (N = 5) that were collaborating with the SHGs: CP A was a leader of a SHG for cancer survivors, B was a volunteer of SHGs for children with cancer and their parents, C was a staff consultant of SHGs for parents of children having cancer in her hospital, D was an experienced psychotherapist, counseling terminally ill members of SHGs that had survived various types of cancers and D was a researcher developing a scale to evaluate supportive functions of SHGs for cancer survivors. The results suggested that the main collaborative roles of CPs' were to assess and coordinate supportive functions of SHGs. The significance of the role of CP's as volunteers was discussed.