Psychiatry and clinical psychology have many common problems. Working in both fields are a number of individuals without adequate training or qualifications. Both are comparatively recent off-shoots of older professions and both have made enormous gains in knowledge within the last few years. Clinical psychology has made its major contribution to the practice of clinical psychiatry in the development and application of various personality tests. The author states that in order to do competent psychotherapy the clinical psychologist must develop an adequate training program and be adequately supervised. He is convinced that the clinical psychologist and the psychiatrist can make indispensable contributions to each other's fields but both have much to learn from and about each other.