| Season: | 2004–05 |
| League Result: | 5th |
| League Topscorer: | Péguy Luyindula (10) |
| Pattern La1: | _om0405h |
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| Nextseason: | 2005–06 |
Olympique de Marseille had a disappointing season, with three managers passing by en route to a fifth-place finish in Ligue 1 and two premature domestic cup exits. With striker Didier Drogba being sold to Chelsea, and replacements Habib Bamogo and Péguy Luyindula not performing at a similar level, the goal-scoring went dry, but in spite of scoring two points less than the previous season, OM finished two positions above the previous season.
See main article: 2004–05 Ligue 1.
See main article: 2004–05 Coupe de France.
See main article: 2004–05 Coupe de la Ligue.