Current discussions regarding scientific realism and antirealism are still facing the problem of terminological confusions. It has been claimed that there are as many realisms and anti-realisms as philosophers who support them. The mail goal of this article is to expound as precisely as posible the sort of realism argumented by Karl Popper. I have chosen to refer to it as “illustrated realism”. I will show its principal characteristics and theses in ontological, semantical, and epistemological areas. This is very necessary in order to assess Popper's illustrated realism and his contribution to contemporary discussions on realism and anti-realism issues.Las discusiones actuales sobre el realismo y el anti-realismo científico siguen sufriendo de confusiones terminológicas. Esto ha conducido a que se sostenga que existen tantos realismos y anti-realismos como filósofos que los formulan y apoyan. El principal objetivo de este artículo es precisar en qué consiste el realismo de Popper que he decidido llamar realismo ilustrado, y mostrar sus principales características y tesis en los ámbitos ontológicos, semánticos y epistemológicos. Esto es necesario si queremos evaluar este realismo y su relevancia a la discusión contemporánea sobre el debate realismo/-anti-realismo.