Critical Theory has aroused constant interest in Spain since the late Francoist period and the transition to democracy. This chapter presents some general aspects of its reception in Spain, which has not been free of ups and downs, biases and misunderstandings, and then delves into a more detailed profile of some representative authors: the Marxist philosophers Manuel Sacristán and Jacobo Muñoz, the moral philosopher Javier Muguerza, and the essayist Rafael Sánchez Ferlosio.