A large measure of the development and validation of cognitive-behavioral models of depression have taken place within the past two decades. A variety of theoretical formulations have been proposed, but that originated by Beck (1967) is the most comprehensive and widely known and has attracted the interest of researchers, as well documented in this volume. A seminal study by Rush et al. (1977), reporting effectiveness of cognitive therapy in depression in a comparison with imipramine treatment, challenged clinical researchers to attempt replication. At about the same time, Shaw (1977) demonstrated effectiveness of cognitive group therapy in depression in a comparison with behavioral group therapy. In order to test the efficacy of group cognitive-behavioral therapy, a study was designed (Covi and Lipman 1987) in which group cognitive-behavioral therapy was compared with cognitive-behavioral therapy in combination with imipramine and with traditional interpersonal group therapy in outpatients with major depression. During the preparatory phases of this study numerous consultations were started with experts of both cognitive and traditional group therapy. Two manuals were drafted and later revised to guide the delivery of the two types of psychotherapy. In the hope to encourage further development of these techniques and to allow replication of this pilot study and the presently ongoing larger comparative trial, these manuals are presented here with some revisions.