As the culture science, Art History has studied the primitive phenomenon and its influence on 20th century visual arts. This phenomenon is also understood in parallel with the history and theory of architecture, explaining some characteristics of specific movements that emerged as a reaction to modern architecture standards. In this paper we focus on the case of New Brutalism, a pioneer England post-war movement. The story reconstructs the gestation of the same one, exposing how the primitive was approach through Alison and Peter Smithson architecture and reminding a Reyner Banham´s critic position on the memorable image. This work allows us to explain the sign of something deeper from cultural meanings, suggesting the New brutalism and its relation with the primitive as a beginning of the postmodern era, in which architectural image is positioned as new canon.