The objective of this research was to analyze continuing education in Spain by analyzing the evolution of its historical conception. Methodologically, it is a documentary study. Many definitions have been generated for this topic. Deep analysis and the consequent understanding have made it possible to propose three concepts that belong to continuing education in regard to its controversial relationship to adult education. In conclusion, the study explains that the evolutive development of the concept of continuing education in Spain as it relates to adult education has made it possible to glimpse three novel conceptual perceptions that offer a panoramic visión of the context framing the current reality of permanent education. Furthermore, conclusions explain that the evolutive development of the concept of continuing education will depend, in large measure/to a great degree on an interinstitutional, participative strategy that adapts to social changes in the environment.