| 17. Round | 10/01/1998 | AO Proodeftiki | - | Ethnikos Piraeus | 2:3 | ||||
| 18. Round | 17/01/1998 | Ethnikos Piraeus | - | Olympiakos Piraeus | 1:3 | ||||
| 19. Round | 24/01/1998 | AO Kavala | - | Ethnikos Piraeus | 2:1 |  |
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| 20. Round | 31/01/1998 | Iraklis Saloniki | - | Ethnikos Piraeus | 3:2 | ||||
| 21. Round | 07/02/1998 | Ethnikos Piraeus | - | Ionikos Nikea | 0:1 | ||||
| 22. Round | 14/02/1998 | Panathinaikos | - | Ethnikos Piraeus | 4:2 | ||||
| 23. Round | 21/02/1998 | Ethnikos Piraeus | - | Paniliakos Pyrgos | 1:0 | ||||
| 25. Round | 07/03/1998 | Ethnikos Piraeus | - | Apollon Smyrnis | 2:0 | |
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| 26. Round | 14/03/1998 | Panachaiki GE | - | Ethnikos Piraeus | 1:0 | ||||
| 27. Round | 21/03/1998 | Ethnikos Piraeus | - | Veria FC | 0:1 | ||||
| 28. Round | 28/03/1998 | Ethnikos Piraeus | - | PS Kalamata | 2:2 | |
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| 30. Round | 11/04/1998 | Ethnikos Piraeus | - | AEK Athen | 1:3 | |
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| 31. Round | 02/05/1998 | OFI Heraklion | - | Ethnikos Piraeus | 3:0 |  |
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| 32. Round | 10/05/1998 | Ethnikos Piraeus | - | Skoda Xanthi | 1:0 |  |
Colombia