Additions
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 07/2004 |  | Aitor Alcalde | GK | |||
| 07/2004 | | Arbilla | DF | |||
| 07/2004 | | Bergara | DF |  | Athletic Club U19 | Bilbao U19 |
| 07/2004 | | Ion Vélez | FW |
Departures
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 01/2005 | | Aitor Alcalde | GK |  | Amurrio Club | Amurrio Club |
| 07/2004 |  | Fernando Amorebieta | DF |  | Athletic Club B | Bilbao B |
| 07/2004 | | Garmendia | MF | | Athletic Club B | Bilbao B |
| 07/2004 |  | Javier Iturriaga | MF | | Athletic Club B | Bilbao B |
| 07/2004 | | Mikel Rico | MF |  | UB Conquense | UB Conquense |
| 07/2004 | | Llorente | FW | | Athletic Club B | Bilbao B |