According to Pierre Bourdieu’s field theory, the production and circulation of knowledge are framed in a space of social (inter)action structured by struggles in the definition of specific rules of the game, symbolic capitals, habitus and illusio intertwined with the national contexts. Applied to the international circulation of academic knowledge, this approach added geopolitical structures marked by the existence of centres-peripheries and semi-peripheries, power differentials and intermediators as crucial dimensions. In this chapter, we propose to summarise the central elements of field theory applied to the analysis of circulation of academic knowledge at both national and transregional levels.