Practising two professions is commonplace for a psychoanalyst, but combining the practice of speech therapy with that of psychoanalysis sometimes arouses perplexity. Reactions ranging from the suspicion of splitting to the reproach of omnipotence reflect different images of these two professions in each of the two professional spheres, professions linked by a history that is shared in part, but also permeated by conflicts. For the last thirty years, in the domain of child psychiatry where speech therapy and psychoanalysis co-exist, epistemological divergences have deepened and are experienced on all sides as a challenge to identity. But if one sets passionate reactions aside, practising two clinical professions can stimulate freedom of thought.