2023 Primera B de Chile

The 2023 Primera B de Chile, known as Campeonato Ascenso Betsson 2023 for sponsorship purposes until 15 October 2023, was the 69th season of the Primera B de Chile, Chile's second-tier football league. The fixture for the season was announced on 11 January 2023, with the competition starting on 10 February and ending on 10 December 2023.

Cobreloa won their first Primera B championship in this tournament, securing both the title as well as promotion to the Chilean Primera División with a 2–1 victory over Rangers on the final round of the regular season on 15 October. Deportes Iquique were the other promoted team, defeating Santiago Wanderers in the promotion play-off finals to claim the remaining promotion spot.

Format
The 16 participating teams played each other in a double round-robin tournament (once at home and once away) 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 play-off tournament to decide the second promoted team (Liguilla) was expanded from five to seven teams, which were the ones placing from second to eighth place, and the league runners-up received 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 returning from the previous season, two relegated from the 2022 Campeonato Nacional (Deportes La Serena and Deportes Antofagasta), and the 2022 Segunda División Profesional champions San Marcos de Arica. These teams replaced Magallanes and Deportes Copiapó, who were promoted to the 2023 Campeonato Nacional, as well as Fernández Vial and Deportes Melipilla, both relegated to Segunda División for this season.

Promotion play-off
The teams placed from 2nd to 8th 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 the Campeonato Nacional for the next season.

Quarter-finals
Santiago Wanderers won 3–2 on aggregate.

Tied 1–1 on aggregate, Deportes Temuco won on penalties.

Tied 2–2 on aggregate, Deportes Antofagasta won on penalties.

Semi-finals
Deportes Iquique won 5–2 on aggregate.

Santiago Wanderers won 4–2 on aggregate.

Finals
Tied 4–4 on aggregate, Deportes Iquique won on penalties and promoted to the Chilean Primera División.

Top scorers
Source: Soccerway