2024 Campeonato Nacional Primera B
The 2024 Primera B de Chile, also known as Campeonato Ascenso Clínicas ACHS Salud 2024 due to sponsorship by the Chilean Safety Association, was the 70th season of the Primera B de Chile, Chile's second-tier football league. The fixture for the season was announced on 24 January 2024, with the competition beginning on 23 February and ending on 7 December 2024.
Deportes La Serena won their fourth Primera B de Chile title in this season, securing both the championship and promotion to the Chilean Primera División with three matchdays to go in the regular season after a 1–0 win against Deportes Recoleta and a 3–2 loss for Barnechea against Deportes Antofagasta on 29 September. The other promoted side was Deportes Limache, who won the promotion play-offs after defeating Rangers on penalty kicks in the finals.
Format
The competition was run under the same format used in the most recent seasons, in which the 16 participating teams played each other in a double round-robin tournament for a total of 30 matches, with the top team at the end of the 30 rounds winning the championship as well as promotion to the Campeonato Nacional for the following season. The next seven best-placed teams at the end of the regular season took part in a play-off tournament to decide the second promoted team, with the league runners-up receiving a bye to the semi-finals. The playoffs winning team was the second and last promoted team to the top flight for the following season. The bottom-placed team at the end of the regular season was relegated to the Segunda División Profesional.Teams
The tournament was played by 16 teams, 13 of them returning from the previous season, two relegated from the 2023 Campeonato Nacional, and the 2023 Segunda División Profesional champions Deportes Limache. These teams replaced Cobreloa and Deportes Iquique, who were promoted to the 2024 Campeonato Nacional, as well as Deportes Puerto Montt, relegated to Segunda División for this season.Stadia and locations
;NotesStandings
Results
Promotion play-off
The teams placed from second to eighth place in the regular season played a double-legged knockout competition with the regular season runner-up getting a bye to the semi-finals. The winning side claimed the last promotion spot to Primera División for the next season.Bracket
Quarter-finals
Rangers won 4–3 on aggregate.----
Deportes Limache won 6–1 on aggregate.
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''Deportes Recoleta won 3–2 on aggregate.''
Semi-finals
Tied 2–2 on aggregate, Deportes Limache won on penalties.----
''Rangers won 1–0 on aggregate.''
Finals
----''Tied 4–4 on aggregate, Deportes Limache won on penalties and promoted to the Chilean Primera División.''