| 3. Round | 03/09/2017 | Peña Sport FC | - | SD Gernika | 0:1 | ||||
| 4. Round | 10/09/2017 | CD Mirandés | - | Peña Sport FC | 1:0 | ||||
| 7. Round | 30/09/2017 | SD Leioa | - | Peña Sport FC | 3:0 | ||||
| 8. Round | 08/10/2017 | Peña Sport FC | - | CD Izarra | 0:1 | ||||
| 9. Round | 15/10/2017 | Athletic Club B | - | Peña Sport FC | 4:1 |  |
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| 10. Round | 21/10/2017 | Peña Sport FC | - | CD Vitoria | 1:2 |  |
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| 17. Round | 03/12/2017 | CD Tudelano | - | Peña Sport FC | 0:1 | ||||
| 21. Round | 14/01/2018 | Peña Sport FC | - | Arenas de Getxo | 3:3 | ||||
| 22. Round | 20/01/2018 | SD Gernika | - | Peña Sport FC | 3:1 | ||||
| 23. Round | 28/01/2018 | Peña Sport FC | - | CD Mirandés | 1:3 | |
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| 30. Round | 18/03/2018 | Peña Sport FC | - | Barakaldo CF | 0:1 | ||||
| 31. Round | 24/03/2018 | SD Amorebieta | - | Peña Sport FC | 4:1 | ||||
| 32. Round | 31/03/2018 | Peña Sport FC | - | Burgos CF | 2:0 | |
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| 33. Round | 08/04/2018 | Caudal Deportivo | - | Peña Sport FC | 0:2 | |
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| 38. Round | 13/05/2018 | Peña Sport FC | - | Real Sociedad B | 1:3 | |
Spain