| 9. Round | 28/09/2003 | Kamen Ingrad | - | NK Marsonia | 5:0 |  |
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| 10. Round | 04/10/2003 | NK Marsonia | - | NK Inter Zaprešić | 0:1 | ||||
| 11. Round | 18/10/2003 | HNK Cibalia | - | NK Marsonia | 2:4 | ||||
| 12. Round | 25/10/2003 | NK Varteks | - | NK Marsonia | 1:1 | ||||
| 14. Round | 08/11/2003 | NK Zadar | - | NK Marsonia | 3:2 | ||||
| 16. Round | 29/11/2003 | NK Marsonia | - | NK Osijek | 1:2 | ||||
| 17. Round | 06/12/2003 | Slaven Belupo | - | NK Marsonia | 3:1 | ||||
| 18. Round | 21/02/2004 | NK Marsonia | - | Hajduk Split | 0:1 | |
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| 19. Round | 28/02/2004 | NK Zagreb | - | NK Marsonia | 2:3 | ||||
| 20. Round | 06/03/2004 | NK Marsonia | - | Kamen Ingrad | 0:2 | ||||
| 21. Round | 13/03/2004 | NK Inter Zaprešić | - | NK Marsonia | 1:1 |  |
Croatia