The conflict has pointed out between clinical psychology and academic psychology in Japan. A possible solution to the conflict will emerge on the model of British Psychological Association. The clinical psychology, the psychotherapy and the counselling are different professions in Britain, since the type of work and the training system of each healthcare professionals is highly specialized in Britain. The practice of clinical psychologist is based on the policy of the scientist-practitioner model and the principle of the evidence-based practice. The area of abnormal psychology in British psychology has functioned as a mediator between clinical psychology and academic psychology in Britain. In contrast, the science-based clinical psychologist is a minority group in Japanese psychologists, although psychotherapy and counselling are prosperous in Japan. Abnormal psychology is premature in Japan, so a conflict emerge between clinical and academic psychology. It was proposed to establish science-based clinical psychology and abnormal psychology in Japan in order to resolve the conflict.