| 1. Round | 25/08/2019 | Haro Deportivo | - | Athletic Club B | 1:4 |  |
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| 2. Round | 31/08/2019 | Athletic Club B | - | CD Calahorra | 0:0 | ||||
| 3. Round | 08/09/2019 | Cultural Leonesa | - | Athletic Club B | 5:2 | ||||
| 4. Round | 14/09/2019 | Athletic Club B | - | Salamanca CF UDS | 4:0 | |
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| 8. Round | 12/10/2019 | Athletic Club B | - | SD Amorebieta | 3:3 | ||||
| 20. Round | 15/01/2020 | Athletic Club B | - | Haro Deportivo | 2:3 |  |
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| 21. Round | 19/01/2020 | CD Calahorra | - | Athletic Club B | 2:3 | ||||
| 25. Round | 15/02/2020 | CA Osasuna B | - | Athletic Club B | 1:1 | |
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| 26. Round | 22/02/2020 | Athletic Club B | - | Arenas de Getxo | 1:1 | ||||
| 27. Round | 29/02/2020 | SD Amorebieta | - | Athletic Club B | 2:1 | ||||
| 28. Round | 07/03/2020 | Athletic Club B | - | Real Unión | 3:3 |
Spain