| Competition: | Primera B de Chile |
| Season: | 2003 |
| Winners: | Everton |
| Promoted: | Everton Deportes La Serena |
| League Topscorer: | Claudio Videla (23) |
| Prevseason: | 2002 |
| Nextseason: | 2004 |
The 2003 Primera B de Chile was the 53rd completed season of the Primera B de Chile.