The 2024 Argentine Primera B Metropolitana was the 127th. season of Primera B Metropolitana, the third division of the Argentine football league system. The season began on 2 February and ended on 14 December 2024. Twenty-two teams competed in the league.
A total of 22 teams took part of the competition, with six teams from 2023 Primera C, they were Excursionistas, Deportivo Laferrere, Ferrocarril Midland, Sportivo Italiano, Liniers y San MartÃÂn de Burzaco, plus two relegated clubs from 2023 Primera Nacional, Flandria and Villa Dálmine.
The championship was won by Colegiales, winner of Torneo Clausura, which defeated Los Andes (winner of Apertura) in a two-legged series, also promoting to 2025 Primera Nacional.
During the course of a season, two round-robin tournaments were played. The two winners played each other and the winner was recognized as the Primera B champion and automatically promoted to Primera B Nacional.
The loser and the teams that held the six best positions at the aggregate table had the chance to enter the Torneo Reducido (small tournament) whose winner would be promoted.
The team with the lowest aggregate points total in Primera B Metropolitana was relegated to Primera C Metropolitana.
Besides, the champion and the five best placed teams qualified to 2025 Copa Argentina.
The winners of Torneo Apertura (Los Andes) and Clausura (Colegiales) played a two-legged series to decide the champions and the first team promoted to Primera Nacional. The losing team entered the Torneo Reducido in the second round.
The teams best placed in the general table (with the exception of winners of Torneo Apertura and Clausura) qualified to "Torneo Reducido", an elimination tournament played over two legs which will define the team that will play a promotion playoff against a team from Torneo Federal A seeking promotion to Primera Nacional. Best placed teams will face worst placed teams (p.e., 1 vs 6, 2 vs 5, 3 vs 4). In the second round, the championship final loser will enter the Reducido. In case of the series ended in a tie, a penalty shoot-out will be conducted, with no extra time.
Winners of Torneo Reducido (Los Andes) and Sarmiento (LB) (winner of "Reválida" stage of 2024 Torneo Federal A) will play a match to define which team promote to the second division in order to play the 2025 Primera Nacional season.