The 2017 Primera B de Chile, known as the 2017 Campeonato de Transición Loto for sponsorship purposes, was the 64th season of Chile's second-tier football league.
[1] a: Deportes Copiapó temporarily plays its home games at Estadio La Caldera in Caldera due to remodeling works at Estadio Luis Valenzuela Hermosilla.
b: Unión La Calera temporarily plays its home games at Estadio Municipal Lucio Fariña Fernández in Quillota due to remodeling works at Estadio Municipal Nicolás Chahuán Nazar.
Source: Soccerway The promotion playoff was played by three teams: Santiago Wanderers, as the last-placed in the Primera División relegation table, 2016–17 Primera B runners-up San Marcos de Arica, and 2017 Primera B champions Unión La Calera.
The team with the lowest average was relegated to the Segunda División Profesional.