En el presente trabajo, se trabajará en torno a la agresividad en la psicosis. En base a los aportes que Lacan toma de la psiquiatría durante el primer período de su enseñanza, se trabajará en torno a los conceptos de agresión y agresividad y su tesis del acto agresivo como resolutorio del delirio.Asimismo, se tomarán diversos autores a fin de interrogar la función del tratamiento y la concepción de la cura allí. Palabras clave Agresividad psicosis - Delirio cura tratamiento ABSTRACT AGGRESSIVENESS IN PSYCHOSIS The proposal of this work is to think about aggressiveness in psychosis. Based on the contributions that Lacan takes from psychiatry during the first period of his teaching, we will work on the concepts of aggression and aggressiveness and his thesis of the aggressive act as a solution to delirium. Likewise, various authors will be taken as reference in order to question the function of the treatment and the conception of the cure there. Keywords Aggressiveness in psychosis - Delirium cure treatment