| 1. Round | 26/07/2003 | NK Marsonia | - | NK Varteks | 0:0 | ||||
| 5. Round | 23/08/2003 | NK Osijek | - | NK Marsonia | 2:1 | ||||
| 6. Round | 30/08/2003 | NK Marsonia | - | Slaven Belupo | 0:0 | ||||
| 8. Round | 20/09/2003 | NK Marsonia | - | NK Zagreb | 3:0 | ||||
| 10. Round | 04/10/2003 | NK Marsonia | - | NK Inter Zaprešić | 0:1 | ||||
| 11. Round | 18/10/2003 | HNK Cibalia | - | NK Marsonia | 2:4 |  |
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| 12. Round | 25/10/2003 | NK Varteks | - | NK Marsonia | 1:1 | |
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| 13. Round | 02/11/2003 | NK Marsonia | - | Dinamo Zagreb | 1:3 | |
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| 14. Round | 08/11/2003 | NK Zadar | - | NK Marsonia | 3:2 | ||||
| 15. Round | 22/11/2003 | HNK Rijeka | - | NK Marsonia | 3:1 | ||||
| 16. Round | 29/11/2003 | NK Marsonia | - | NK Osijek | 1:2 | |
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| 17. Round | 06/12/2003 | Slaven Belupo | - | NK Marsonia | 3:1 | |
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| 21. Round | 13/03/2004 | NK Inter Zaprešić | - | NK Marsonia | 1:1 |  |
Croatia