Additions
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 07/2006 |  | Iago Herrerín | GK |  | Athletic Club U19 | Bilbao U19 |
| 07/2006 | | Ariño | DF | | Athletic Club U19 | Bilbao U19 |
| 07/2006 | | Ekiza | DF | | Athletic Club U19 | Bilbao U19 |
| 07/2006 | | Eneko Bóveda | DF | |||
| 07/2006 | | Eriz | DF | |||
| 07/2006 | | Iñigo Pérez | MF | | Athletic Club U19 | Bilbao U19 |
| 07/2006 | | Aguirreoa | MA |  | CF Palencia | CF Palencia |
Departures
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 01/2007 | | Iago Herrerín | GK |  | Barakaldo CF | Barakaldo CF |
| 07/2006 | | Mandaluniz | GK |  | Athletic Club B | Bilbao B |
| 07/2006 | | Aguiar | DF | | Athletic Club B | Bilbao B |
| 07/2006 | | Bergara | DF | | Athletic Club B | Bilbao B |
| 07/2006 | | Jon Carracedo | DF | | Athletic Club B | Bilbao B |
| 07/2006 | | Beñat | MF | | Athletic Club B | Bilbao B |
| 07/2006 | | Eneko Rubio | MF | | Athletic Club B | Bilbao B |
| 07/2006 | | Markel Susaeta | FW | | Athletic Club B | Bilbao B |