The results indicated that problem-solving therapy was more effective than supportive therapy for reducing depression and for improving interpersonal problem-solving self-efficacy at posttest. At 3 month follow-up there continued to be differences between the groups in depression, but not in problem-solving self-efficacy. In addition, at follow-up problem-solving therapy was more effective than supportive therapy for reducing hopelessness and loneliness. Although there were no differences between the groups on severity of suicidal ideations, within group analyses revealed that problem-so1ving therapy significantly reduced severity of ideations over time.The findings suggest that social problem-solving therapy is a more effective treatment than supportive therapy for reducing depression, hopelessness, and loneliness of suicidal individuals. This may be due to social problem-solving deficits being a key problem for suicidal individuals.