| 2004 Campeón de Campeones | |
| Team1: | Pachuca |
| Team1score: | 3 |
| Team2: | UNAM |
| Team2score: | 7 |
| Firstleg: | First Leg |
| Team1score1: | 2 |
| Team2score1: | 1 |
| Date1: | August 1, 2004 |
| Stadium1: | Estadio Hidalgo |
| City1: | Pachuca |
| Referee1: | Armando Archundia |
| Attendance1: | 28,000 |
| Secondleg: | Second Leg |
| Team1score2: | 1 |
| Team2score2: | 6 |
| Date2: | August 8, 2004 |
| Stadium2: | Estadio Olimpico Universitario |
| City2: | México City |
| Referee2: | José Abramo Lira |
| Attendance2: | 34,500 |
| Previous: | 2003 |
| Next: | 2005 |
The 2004 Campeón de Campeones was the 40th edition of the Campeón de Campeones. The match-up featured Pachuca, the winners of the Apertura 2003, and UNAM, the winners of the Clausura 2004. It was staged over two legs.
| Team | Qualification | Previous participations (bold indicates winners) | |
|---|---|---|---|
| Pachuca | Winners of the Apertura 2003 | None | |
| UNAM | Winners of the Clausura 2004 | 1 (1975) |
| Pachuca | Mexico City | |
|---|---|---|
| Estadio Hidalgo | Estadio Olímpico Universitario | |
| Capacity: 30,000 | Capacity: 69,000 | |