This article tries to put in the historical context of the modern cinema part of the filmography that the Catalan director Pere Portabella (Figueres, 1927) developed, between 1967 and 1976, under the dictatorship of General Franco. In this period, Portabella built a cinematic form that may be considered to fall under cinematographic modernity which aims to subvert the foundations of the Institutional Mode of Representation. The author provides an avant-garde film corpus characterized by its formal and aesthetic subversions, as well as the presence of a strong political thematic. Under this premise, he shot Informe general (1976), a documentary film that aimed to be a political state of art of the Spanish Transition.