| Competition: | Primera B de Chile |
| Season: | 1999 |
| Winners: | Unión Española |
| Promoted: | Unión Española Santiago Wanderers Everton Provincial Osorno |
| Relegated: | Deportes Colchagua |
| Prevseason: | 1998 |
| Nextseason: | 2000 |
The 1999 Primera B de Chile was the 49th completed season of soccer of the Primera B de Chile.
Unión Española was tournament’s champion.[1]
Half of the first phase points were carried over as bonus points in the second phase.