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| 1st(1st leg) | Cobreloa | - | Cobresal | 2:1 | ||
| 2nd (2nd leg) | Cobresal | - | Cobreloa | 2:2 | ||
| 1st(1st leg): 01/12/2004 | 2nd (2nd leg): 04/12/2004 | Winner: Cobreloa | ||||
| 1st(1st leg) | Deportes Temuco | - | Universidad Católica | 3:1 | ||
| 2nd (2nd leg) | Universidad Católica | - | Deportes Temuco | 6:2 | ||
| 1st(1st leg): 01/12/2004 | 2nd (2nd leg): 04/12/2004 | Winner: Universidad Católica | ||||
| 1st(1st leg) | Unión Española | - | Universidad de Chile | 4:3 | ||
| 2nd (2nd leg) | Universidad de Chile | - | Unión Española | 2:4 pso | ||
| 1st(1st leg): 02/12/2004 | 2nd (2nd leg): 05/12/2004 | Winner: Unión Española | ||||
| 1st(1st leg) | Everton | - | Colo-Colo | 1:3 | ||
| 2nd (2nd leg) | Colo-Colo | - | Everton | 3:4 | ||
| 1st(1st leg): 02/12/2004 | 2nd (2nd leg): 05/12/2004 | Winner: Colo-Colo | ||||
