Tercera B
| Founded | 1983 |
|---|---|
| Country | Chile |
| Confederation | CONMEBOL |
| Number of clubs | 36 |
| Level on pyramid | 5 |
| Promotion to | Tercera División |
| Relegation to | Local Association |
| Current champions | Aguará (1st title) |
| Most championships | Juventud O'Higgins (2 titles) |
| Broadcaster(s) | DirecTV Sports CDF |
| Website | Official webpage |
Tercera División B de Chile (Third Division B of Chile), is the fifth tier of Chilean football (soccer) in the Liga Chilena de Fútbol, and is organized by the Federación de Fútbol de Chile and the Asociación Nacional de Fútbol Amateur de Chile. It is both the fifth level of the Chilean football league system and the second league for Chilean Football Youth Leagues.