| 1. Round | 09/08/2003 | Germinal Beerschot | - | RAEC Mons | 1:0 |  |
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| 2. Round | 17/08/2003 | RAEC Mons | - | Excelsior Mouscron | 3:3 | |
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| 3. Round | 23/08/2003 | Standard Liège | - | RAEC Mons | 4:0 | ||||
| 4. Round | 31/08/2003 | RAEC Mons | - | Sporting Lokeren | 1:1 | ||||
| 5. Round | 14/09/2003 | RAEC Mons | - | Lierse SK (old) | 1:3 | ||||
| 6. Round | 20/09/2003 | KRC Genk | - | RAEC Mons | 0:0 | ||||
| 7. Round | 27/09/2003 | RAEC Mons | - | Cercle Brugge | 0:0 | |
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| 9. Round | 18/10/2003 | RAEC Mons | - | Royal Antwerp FC | 1:0 | |
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| 10. Round | 25/10/2003 | KAA Gent | - | RAEC Mons | 0:0 | ||||
| 11. Round | 01/11/2003 | RAEC Mons | - | Sint-Truidense VV | 3:4 | |
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| 12. Round | 09/11/2003 | KSK Beveren | - | RAEC Mons | 2:0 | ||||
| 13. Round | 21/11/2003 | RAEC Mons | - | RSC Anderlecht | 0:2 | ||||
| 14. Round | 29/11/2003 | KVC Westerlo | - | RAEC Mons | 0:1 | ||||
| 15. Round | 07/12/2003 | RAEC Mons | - | Koninklijke Heusden-Zolder SK | 1:2 | ||||
| 16. Round | 13/12/2003 | Club Brugge KV | - | RAEC Mons | 2:0 | ||||
| 17. Round | 20/12/2003 | RAEC Mons | - | Sporting Charleroi | 2:2 | |
Romania