[Notes concerning two psychodrama treatments in a psychiatric institution (author's transl)]

After describing the introduction and evolution of two psychodrama treatment sessions in a psychiatric service, the author proposes an analysis of the processes underscoring the observed effects. On the one hand, the effects of the psychodrama game are indicated : elaboration of fantasies, projections and repetitions, emergence of identifications, analysis of transfert and effect of the comment. On the other hand, an indirect psychotherapeutic effect is demonstrated : modifications in institutional relationships seem to have been an important factor in the patients' course.