The 2013-14 season, is the 29º Primera B Metropolitana season since it became part of the third tier of the Argentine football league system. The tournament is reserved for teams directly affiliated to the Asociación del Fútbol Argentino (AFA), while teams affiliated to AFA through local leagues (known as "indirectly affiliated to AFA") have to play the Torneo Federal A, which is the other third tier competition. For this season, AFA decided to change the structure in the Argentine football league system, and exceptionally 3 teams will be promoted to the next season of Primera B Nacional and there will be no relegations for this season. A total of 22 teams competed.