| Competition: | Campeonato Nacional |
| Dates: | 28 July – 21 December 2017 |
| Winners: | Colo-Colo (32nd title) |
| Relegated: | Santiago Wanderers |
| Matches: | 122 |
| Total Goals: | 279 |
| Continentalcup1: | Copa Libertadores |
| Continentalcup1 Qualifiers: | Colo-Colo Santiago Wanderers (cup winners) Universidad de Concepción |
| Continentalcup2: | Copa Sudamericana |
| Continentalcup2 Qualifiers: | Unión Española Everton Audax Italiano Deportes Temuco |
| League Topscorer: | Bryan Carrasco (10 goals) |
| Biggest Home Win: | |
| Highest Attendance: | 42,333 |
| Attendance: | 974,055 |
| Average Attendance: | 8,117 |
| Prevseason: | 2016–17 |
| Nextseason: | 2018 |
The 2017 Campeonato Nacional season, known as Campeonato Nacional de Transición Scotiabank 2017 for sponsorship purposes, was the 87th season of top-flight football in Chile. Colo-Colo won their thirty-second title following a 3–0 away win at Huachipato on 9 December.[1] Universidad de Chile were the defending champions.
Starting in 2017, the ANFP approved a change from the European calendar season (July–May) that had been used since 2013 to a calendar year season (February–December).[2] The year calendar would have been implemented for the 2017 season, however, it was postponed for one year. In order to manage this transition, the 2017 Clausura tournament, part of the 2016–17 season, was followed up by a single championship in the second semester of the year. The 2018 season will be played as a single tournament, without the Apertura-Clausura system.[3]
| Team | City | Stadium | |
|---|---|---|---|
| Bicentenario de La Florida | |||
| Santiago | Monumental David Arellano | ||
| CAP | |||
| Santiago | |||
| Lucio Fariña Fernández | |||
| Santiago | Santa Laura-Universidad SEK | ||
| Santiago | San Carlos de Apoquindo | ||
| Santiago | |||
| Team | Head coach | Captain | Kit manufacturer | Sponsors | |
|---|---|---|---|---|---|
| Hugo Vilches | Nicolás Peric | Macron | Traverso | ||
| Colo-Colo |  Pablo Guede | Esteban Paredes | Under Armour | DirecTV | |
| Luis Marcoleta | Martín Cortés | Onefit | Multihogar | ||
| Nicolás Larcamón | Gonzalo Villagra | Cafu | Minera Escondida | ||
| Deportes Iquique | Erick Guerrero (caretaker) | Rodrigo Naranjo | Rete | UNAP | |
| Dalcio Giovagnoli | Cristián Canío | Joma | Rosen | ||
| Pablo Sánchez | Marcos Velásquez | Pirma | Viña del Mar-Fox Sports-Claro | ||
| Huachipato | César Vigevani | Omar Merlo | Mitre | PF | |
| Gabriel Milito | Albert Acevedo | New Balance | VTR | ||
| Germán Cavalieri | Roberto Cereceda | Training | Bank of Palestine | ||
| San Luis | Miguel Ramírez | Daniel Vicencio | Luanvi | PF | |
| Nicolás Córdova | Gabriel Castellón | Macron | Terminal Pacifico Sur Valparaiso | ||
| Martín Palermo | Jorge Ampuero | Kappa | Universidad SEK | ||
| Mario Salas | Cristian Álvarez | Umbro | DirecTV | ||
| Ángel Guillermo Hoyos | Johnny Herrera | Adidas | Chevrolet | ||
| Francisco Bozán | Alejandro Camargo | KS7 | Universidad de Concepción |
| Team | Outgoing manager | Manner of departure | Date of vacancy | Position in table | Incoming manager | Date of appointment |
|---|---|---|---|---|---|---|
| O'Higgins | Cristián Arán | Resigned | 31 July[4] | 16th | Gabriel Milito | 9 August[5] |
| Deportes Iquique | Jaime Vera | 21 October[6] | 15th | Erick Guerrero | 23 October[7] |
Source: Soccerway
The runners-up playoff was played between:
The winner qualified for the 2018 Copa Libertadores second stage, while the loser qualified for the 2018 Copa Sudamericana first stage. In the event that the same team ended up as runners-up of both tournaments, the playoff would not be played and that team would qualify for the Copa Libertadores. The Copa Sudamericana berth would then be awarded to the 2017 Transición best team not already qualified.[8]
Universidad de Concepción won 3–1 on aggregate.
Relegation is determined at the end of the season by computing an average of the number of points earned per game over the three most recent tournaments: 2016 Apertura, 2017 Clausura and 2017 Transición. The team with the lowest average qualified for the relegation playoff.
| width=28 | width=185 | Team | width=50 | width=50 | width=50 | width=50 | width=50 | Relegation | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Colo-Colo | 52 | 33 | 85 | 45 | |||||||||
| 2 | Universidad de Chile | 51 | 30 | 81 | 45 | |||||||||
| 3 | Unión Española | 49 | 31 | 80 | 45 | |||||||||
| 4 | Universidad Católica | 54 | 16 | 70 | 45 | |||||||||
| 5 | O'Higgins | 48 | 15 | 63 | 45 | |||||||||
| 6 | Everton | 36 | 26 | 62 | 45 | |||||||||
| 7 | Audax Italiano | 37 | 25 | 62 | 45 | |||||||||
| 8 | Deportes Temuco | 38 | 22 | 60 | 45 | |||||||||
| 9 | Deportes Iquique | 50 | 9 | 59 | 45 | |||||||||
| 10 | Deportes Antofagasta | 37 | 21 | 58 | 45 | |||||||||
| 11 | San Luis | 39 | 18 | 57 | 45 | |||||||||
| 12 | 38 | 17 | 55 | 45 | ||||||||||
| 13 | Curicó Unido | — | 18 | 18 | 15 | |||||||||
| 14 | Huachipato | 36 | 16 | 52 | 45 | |||||||||
| 15 | Palestino | 35 | 13 | 48 | 45 | |||||||||
| 16 | Santiago Wanderers (R) | 31 | 15 | 46 | 45 | Qualification to Relegation playoff |
The relegation playoff was played by three teams: the last-placed in the relegation table (Santiago Wanderers), 2016–17 Primera B runners-up San Marcos de Arica, and 2017 Primera B champions Unión La Calera. The two Primera B teams played each other with the winner qualifying to the final against the Primera División team for promotion to the top flight for the 2018 season.