El presente trabajo se inscribe dentro del proyecto UBACyT “¿A qué llamar eficacia analítica? Contribuciones a partir del estudio de casos” dirigido por Adriana Rubistein.La eficacia analítica no se confunde con la eficiencia en términos de mercado, ni con la desaparición de los síntomas, ni con la adaptación a parámetros esperables sino que se recorta a partir de considerar los modos o los arreglos que cada serhablante ha producido como respuesta al encuentro con lo real del trauma. En esta oportunidad nos proponemos dar cuenta de la noción de la eficacia analítica a partir de un material clínico trabajado en el marco de la investigación. Palabras Clave Eficacia, Goce real, Psicoanálisis Abstract THE ANALYTIC EFFICACY FRONT THE REAL OF THE JOUISSANCE This work is part of ubacyt research:What is psychoanalitic efficacy? Contributions from case studies”, directed by Adriana Rubistein.The analytic efficacy can not be separated from the way of conceiving the human condition. It is not like efficiency in the capitalist world, and doesn’t pretend the adaptation. It must be delimited looking for the different tries created for everyone, to ask to the real trauma. The analysis is not a practice without consequences. It produces effects, which can make “more bearable the condition of being speaker.” Our research aims are to give account of these effects, find their logic, know the place where the analyst action has its effectiveness , explore in cases the effectiveness of the analytical work in the production of changes in the position of the subject and in his responses to trauma. In this paper we are going to interrogate the effects of analytic interventions in a case. Key Words Efficacy, Psychoanalysis, Case