| Competition: | Campeonato Nacional Apertura Petrobras |
| Dates: | 26 July – 10 December 2013 |
| Winners: | O'Higgins (1st title) |
| Continentalcup1: | 2014 Copa Libertadores |
| Continentalcup1 Qualifiers: | O'Higgins Universidad de Chile (Liguilla winners) |
| Continentalcup2: | 2014 Copa Sudamericana |
| Continentalcup2 Qualifiers: | Deportes Iquique (Liguilla runners-up) |
| League Topscorer: | Luciano Vázquez (11 goals) |
| Highest Attendance: | 40,000 Universidad Católica 0–1 O'Higgins (10 December) |
| Attendance: | 759,917 |
| Average Attendance: | 4,928 |
| Matches: | 154 |
| Total Goals: | 395 |
| Prevseason: | 2013 |
| Nextseason: | 2014–C |
The 2013 Campeonato Nacional Apertura began on 26 July and ended on 10 December. The tournament champion was O'Higgins which won its first Primera División de Chile title in 58 years’ history after beating Universidad Católica 1–0 in the final play-off played at the Estadio Nacional.[1]
See main article: 2013–14 Súper Final Apertura.
Universidad de Chile qualified to the 2014 Copa Libertadores. Deportes Iquique, as the runner-ups, qualified to the 2014 Copa Sudamericana.