This article proposes a theoretical approach to suicide from the perspective of psychoanalysis proposed by Jacques Lacan. It communicates the results of a research that used a documental analysis methodology. This research used as sample, like primary and secondary sources psychoanalytical texts; also it was used texts that propose different approaches to understanding suicide, current scientific research and data sources of support. As results, research process allows to understand a series of paradoxes that fail to be explained by other theoretical perspectives. Psychoanalysis with its conception of a subject structured as a language, and the unveiling of a structure which does sort of course all forms of suicide, it embraces a theoretical universe, a whole series of events associated with suicide. This conception of the subject raised by lacanian psychoanalysis, necessarily lead to introduce an ethical dimension, which inevitably follows a responsibility of the subject towards what happens to him, suggesting in turn an specific clinical practice to psychoanalysis. © Revista Colombiana de Ciencias Sociales.