The 2004 season was Cienciano's 103rd season since its founding in 1901.[1] The club played the Torneo Descentralizado, the Copa Libertadores and the Recopa Sudamericana.
| Club: | Cienciano |
| Season: | 2004 |
| Manager: | Freddy Ternero |
| League: | Torneo Descentralizado |
| League Result: | 1st (Aggregate table) |
| Cup1 Result: | Group stage |
| Pattern B1: | _red |
| Leftarm1: | FF0000 |
| Body1: | FF0000 |
| Rightarm1: | FF0000 |
| Shorts1: | FFFFFF |
| Socks1: | FF0000 |
| Prevseason: | 2003 |
| Nextseason: | 2005 |
| Stadium: | Garcilaso |
| Cup2: | Recopa Sudamericana |
| Cup2 Result: | Champion |
See main article: 2004 Torneo Descentralizado.
| Pos | Team | Pld | W | D | L | GF | GA | GD | Pts | |
|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Alianza Lima | 26 | 19 | 4 | 3 | 48 | 16 | +32 | 61 | |
| 2 | Cienciano | 26 | 18 | 3 | 5 | 53 | 28 | +25 | 57 | |
| 3 | Alianza Atlético | 26 | 15 | 5 | 6 | 46 | 29 | +17 | 50 |
| Pos | Team | Pld | W | D | L | GF | GA | GD | Pts | |
|---|---|---|---|---|---|---|---|---|---|---|
| 2 | Universidad San Martín | 26 | 14 | 5 | 7 | 40 | 26 | +14 | 47 | |
| 3 | Cienciano | 26 | 11 | 11 | 4 | 41 | 26 | +15 | 44 | |
| 4 | Universitario | 26 | 11 | 10 | 5 | 34 | 28 | +6 | 43 |
See main article: 2004 Copa Libertadores.
See main article: 2004 Recopa Sudamericana. Cienciano defeated Boca Juniors on penalties and was champion of the tournament.[2]