François Sauvagnat talks about verbal hallucinations, topic on which he has published over fifty articles in several languages. It is with rigor and a great erudition that François Sauvagnat explains the logic of hallucinations and demonstrates that Lacan contributions on this subject have been decisive. In the end, he evokes children's hallucinations, pointing out three precise aspects which, without any doubt, open to a still little explored field. François Sauvagnat is a psychoanalyst in Paris and Rennes. PhD in Paris VI. Professor of psychopathology at the University of Rennes 2. Director of research of the University Paris VI and teacher at the Clinical section of Rennes. Member of the ECF and the World Association of Psychoanalysis. Currently chairs a seminar at l' École Normale Supérieur, about hallucination. He is the author of "Destins de l' adolescence' PUR, mars 1992," Divisions subjectives et other multiples ", Presses Universitaires de Rennes, mars 2001," Le trauma psychique" L'Harmattan, Février 2008, «La Voix», Lysimaque, 1989 and ‘’Foundations of Psychoanalytical Psychopathology’’, Editorial synthesis, 2004. Damien Guyonnet is psychoanalyst in Paris, a member of the ECF and the World Association of Psychoanalysis. Radio Lacan correspondent in Paris.