The article exposes the theoretical debate brings over of the configuration epistemological of the Bioethics. There is realized a descriptive and critical analysis of the principal contributions. Sample like the Bioethics always has had difficulties to be defined; the limits and the internal characteristics of the definite thing have suffered important modifications in his short history. Another present, not less substantial problem, it owes to the different manners of understanding it and therefore to that there does not exist Bioethical univocal concept. Finally, there sign three essential features that sustain his conceptual base, and that to ours to deal, are still for resolving.El artículo expone el debate teórico acerca de la configur...