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| 1st(1st leg) | Unión San Felipe | - | Cobreloa | 0:2 | ||
| 2nd (2nd leg) | Cobreloa | - | Unión San Felipe | 2:1 | ||
| 1st(1st leg): 15/05/2004 | 2nd (2nd leg): 23/05/2004 | Winner: Cobreloa | ||||
| 1st(1st leg) | Rangers | - | Santiago Wanderers | 1:1 | ||
| 2nd (2nd leg) | Santiago Wanderers | - | Rangers | 0:3 | ||
| 1st(1st leg): 15/05/2005 | 2nd (2nd leg): 23/05/2004 | Winner: Rangers | ||||
| 1st(1st leg) | Unión Española | - | Universidad de Chile | 3:1 | ||
| 2nd (2nd leg) | Universidad de Chile | - | Unión Española | 1:1 | ||
| 1st(1st leg): 15/05/2005 | 2nd (2nd leg): 23/05/2004 | Winner: Unión Española | ||||
| 1st(1st leg) | Huachipato | - | Coquimbo Unido | 3:2 | ||
| 2nd (2nd leg) | Coquimbo Unido | - | Huachipato | 0:3 | ||
| 1st(1st leg): 16/05/2005 | 2nd (2nd leg): 23/05/2004 | Winner: Huachipato | ||||
| 1st(1st leg) | Deportes Temuco | - | Universidad de Concepción | 0:1 | ||
| 2nd (2nd leg) | Universidad de Concepción | - | Deportes Temuco | 1:1 | ||
| 1st(1st leg): 16/05/2005 | 2nd (2nd leg): 22/05/2004 | Winner: Universidad de Concepción | ||||
| 1st(1st leg) | Audax Italiano | - | Colo-Colo | 0:1 | ||
| 2nd (2nd leg) | Colo-Colo | - | Audax Italiano | 1:0 | ||
| 1st(1st leg): 16/05/2005 | 2nd (2nd leg): 22/05/2004 | Winner: Colo-Colo | ||||
