This paper is a scholarly survey of psychological factors in bronchial asthma, and includes an extensive bibliography comprising sixty-three papers. The need for a unified theory for allergic and emotional factors is recognized. The possibility of a learning process is considered with tentative mechanisms being outlined to link together emotional conflict, allergic reactivity, and disturbed respiration. Conjoint family therapy is suggested as a new approach which might help shed light on several of the areas involved in an over-all understanding of psychogenesis in asthma.