| 1. Round | 22/08/1998 | OFI Heraklion | - | Ethnikos Piraeus | 3:0 | ||||
| 2. Round | 29/08/1998 | Paniliakos Pyrgos | - | Ethnikos Piraeus | 2:0 |  |
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| 3. Round | 12/09/1998 | Ethnikos Piraeus | - | AO Proodeftiki | 0:2 | |
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| 4. Round | 19/09/1998 | Ethnikos Asteras | - | Ethnikos Piraeus | 1:0 | ||||
| 5. Round | 26/09/1998 | Ethnikos Piraeus | - | PAOK Saloniki | 1:1 | ||||
| 6. Round | 03/10/1998 | Ionikos Nikea | - | Ethnikos Piraeus | 5:0 | |
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| 8. Round | 31/10/1998 | AO Kavala | - | Ethnikos Piraeus | 3:0 | |
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| 9. Round | 07/11/1998 | Ethnikos Piraeus | - | Panathinaikos | 0:0 | ||||
| 10. Round | 21/11/1998 | Ethnikos Piraeus | - | Panionios GSS | 0:4 | ||||
| 12. Round | 05/12/1998 | Ethnikos Piraeus | - | Skoda Xanthi | 1:1 | ||||
| 13. Round | 13/12/1998 | Olympiakos Piraeus | - | Ethnikos Piraeus | 2:0 | ||||
| 14. Round | 20/12/1998 | Ethnikos Piraeus | - | AEK Athen | 1:4 | ||||
| 15. Round | 15/01/1999 | Apollon Smyrnis | - | Ethnikos Piraeus | 4:0 | ||||
| 16. Round | 22/01/1999 | Ethnikos Piraeus | - | Panelefsiniakos Elefsinas | 2:2 |
Greece