Combining psychotherapy and pharmacotherapy concerns at least 1/3 of people being in contact with psychiatrists and psychotherapists. Helping is effective when it is possible to establish a triadic therapeutic alliance involving the patient, the psychiatrist, and the psychotherapist. Cooperation in such a team requires additional skills from clinicians. At the stage of considering the possibility of cooperation, clinicians should contact each other to determine the possibilities and terms of it. Communication between specialists should take place from the beginning of treatment. It is important for specialists to share at least such information as prolonged absence of any of them, change in the therapeutic approach, significant changes in the clinical condition, or the overall impression about the patient’s response to treatment. There are also situations in which it is not possible to establish cooperation which would be satisfactory for all the specialists. In this article, the authors discuss the most important principles of good cooperation between a psychiatrist and a psychotherapist and point out the factors that promote it. These can be the starting point for creating recommendations regarding good practices in this field and initiate a discussion within the professional environment on this subject.