| Countries: |  France |
| Champions: | Biarritz Olympique |
| Count: | 4 |
| Runnersup: | Stade Français |
| Relegated: | Grenoble Béziers Auch |
| Prevseason: | 2003–04 |
| Nextseason: | 2005–06 |
The 2004–05 Top 16 season was the top level of French club rugby in 2004–05. It was the final season under the 16 club format, as the competition became the Top 14 for the 2005–06 season. Biarritz Olympique won the championship, defeating Stade Français Paris in the final at Stade de France. FC Grenoble, Béziers and Auch were relegated to Rugby Pro D2 after the 2004–05 season.
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| FB | 15 | Nicolas Brusque | ||
| RW | 14 | |||
| OC | 13 | Guillaume Boussès | ||
| IC | 12 | Damien Traille | ||
| LW | 11 | Jean-Baptiste Gobelet | ||
| FH | 10 | Julien Peyrelongue | ||
| SH | 9 | Dimitri Yachvili | ||
| N8 | 8 | Thomas Lièvremont (c) | ||
| OF | 7 | Imanol Harinordoquy | ||
| BF | 6 | Serge Betsen | ||
| RL | 5 | |||
| LL | 4 | |||
| TP | 3 | |||
| HK | 2 | |||
| LP | 1 |  Petru Bălan | ||
| Replacements: | ||||
| HK | 16 | |||
| PR | 17 | |||
| LK | 18 | |||
| FL | 19 | Didier Chouchan | ||
| SH | 20 | Julien Dupuy | ||
| CE | 21 | |||
| FH | 22 | Benjamin Dambielle | ||
| Coach: | ||||
| Patrice Lagisquet | ||||
| FB | 15 | |||
| RW | 14 | Julien Arias | ||
| OC | 13 | Stéphane Glas | ||
| IC | 12 | Brian Liebenberg | ||
| LW | 11 | |||
| FH | 10 | David Skrela | ||
| SH | 9 |  Agustín Pichot | ||
| N8 | 8 | Shaun Sowerby | ||
| OF | 7 | Rémy Martin | ||
| BF | 6 | |||
| RL | 5 |  Mike James | ||
| LL | 4 | David Auradou (c) | ||
| TP | 3 | |||
| HK | 2 | |||
| LP | 1 | |||
| Replacements: | ||||
| HK | 16 | |||
| PR | 17 | |||
| LK | 18 | |||
| FL | 19 | |||
| WG | 20 | |||
| CE | 21 | |||
| SH | 22 | Jérôme Fillol | ||
| Coach: | ||||
| Fabien Galthié | ||||