Moreno's psychodrama is a technique of training and of group therapy which obeys the laws of sociometry. At the beginning of his career, Moreno as Freud, found himself in a transcultural position which allowed him to better observe the "classical occidental individual" captive of his stereotypal "Tinned culture". The psychodrama aims to the liberation of the human being alienated in his individuality thus giving him back a creative and relational spontaneity owing to the cathartic value of the collective game and drama (taken is its etymological sense). The new American society, issued from the old Europe, allowed him to practise his theoretical conceptions of sociometry. If the Psychodrama is a method of remarkable efficiency in the training of dynamic psychology of groups, its therapeutics indications must be given with the greatest caution, in order to be at any time under medical control, specifically psychiatric control.