The political decision to widen the possibilities of combing individual and group psychotherapy could be a step to promote group psychotherapy within the health system. In view of a limited practical significance instead of very good evidence for the efficacy of group treatments, such a promotion would be desirable. The paper summarized studies of the efficacy of group psychotherapy in general as well as compared to individual psychotherapy and the limited evidence available related to the question of combined treatments. In contrast, one can find a wide variety of clinical-theoretical discussions in the literature which - under certain circumstances recommend combined treatments and related structural conditions. If the political decision - instead of some administrative barriers - really will lead to an increased use of combined treatments, accompanying research should be indispensable.