Bipolar disorder is an early-onset, chronic disorder. It impairs occupational, social, and family functioning, which makes learning to adapt living with the disorder and its treatment critically important. Therefore, it has now become common knowledge that psychosocial interventions are also necessary in the treatment of bipolar disorder adjunctive to pharmacotherapy. Thus, whichever psychosocial interventions are more effective in bipolar disorder is a crucial research question. In this article, cognitive-behavioral therapy, which is applied adjunctive to pharmacotherapy, will be addressed and the findings of research about the effectiveness of these applications will be reviewed.