After the I World War, technological sector experienced a significant progress, the background of modernity in architecture had been improved, not only by the experimentation of material and production, but also by the creation of a machinist aesthetic. Meanwhile technological innovations gradually spread across architecture, the material allowed the testing of new material handling techniques. In this process, the collaboration between Spanish architects and furniture companies acquired a cardinal role in modern design in the country during the 30 s . Through the analysis of several case studies and providing original documentation, this research shows the influence of the work of foreign architects on the design of Spanish furniture in the 30 s and the role of companies, in collaboration with Spanish architects, as catalysts of the new avant-garde currents. With this, a single objective is pursued, which is to show the furniture as an exercise in technological experimentation and a vehicle for the modernization of architecture.