This essay analyses the increase in erotic-pornographic representations during the Spanish Second Republic. The working hypothesis situates the apogee of Spanish pornography during these years, favoured by a political scenario that allowed for the proliferation of publications of this nature. There is examination of the development of sexology as an expression of the interest aroused by the sex / sexuality binomial. There is also analysis of the development of the notion of pornography and, finally, investigation of the entire spectrum of pornographic representations which, at that time, included photography, cinema, erotic novels, licentious magazines and theatre.