Additions
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 08/2003 |  | Sebastián Romero | MF |  | Chacarita Juniors | Chacarita |
| 07/2003 |  | Iker Fernández | GK | |||
| 07/2003 | | Imanol | GK | |||
| 07/2003 | | Alaña | DF |  | Athletic Club B | Bilbao B |
| 07/2003 | | Corredoira | DF |  | SD Compostela | SD Compostela |
| 07/2003 | | Dani Bautista | DF |  | Sevilla Atlético | Sevilla B |
| 07/2003 | | Karmona | DF |  | CD Alavés | Alavés |
| 07/2003 | | Lambea | DF |  | CD Leganés | Leganés |
| 07/2003 | | Arregi | MF |  | Barakaldo CF | Barakaldo CF |
| 07/2003 | | Badiola | MF |  | Real Unión | Real Unión |
| 07/2003 | | Burgueña | MF |  | CD Ourense | CD Ourense |
| 07/2003 | | De La Cruz | MF |  | Orihuela CF | Orihuela CF |
| 07/2003 | | Edu Roldán | MF | | Real Unión | Real Unión |
| 07/2003 | | Óscar Pérez | MF |  | Real Oviedo | Oviedo |
| 07/2003 | | Cuevas | FW | | Athletic Club B | Bilbao B |
| 07/2003 | | Gorka Brit | FW |  | CA Osasuna | Osasuna |
| 07/2003 | | Llorente | FW |  | Real Sociedad | Real Sociedad |
| 07/2003 | | Saizar | FW |  | Gimnàstic de Tarragona | Nàstic |
| 07/2003 | | Amorrortu | MA |
Departures
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 02/2004 | | Zarraga | DF | | Barakaldo CF | Barakaldo CF |
| 02/2004 | | Úriz | MF |  | CD Logroñés | CD Logroñés |
| 07/2003 | | Joaquín Moso | GK |  | Albacete | Albacete |
| 07/2003 | | Álex | DF | | Barakaldo CF | Barakaldo CF |
| 07/2003 | | Asorey | DF | | Barakaldo CF | Barakaldo CF |
| 07/2003 | | Jorge Rodríguez | DF |  | Lorca Deportiva | Lorca Deportiva |
| 07/2003 | | Manuel Ángel | DF |  | Burgos CF | Burgos CF |
| 07/2003 | | Sarriegi | DF | | CD Alavés | Alavés |
| 07/2003 | | Tejero | DF |  | Recreativo Huelva | Recreativo |
| 07/2003 | | Zubizarreta | DF |  | Algeciras CF | Algeciras CF |
| 07/2003 | | Eneko Romo | MF | | CD Alavés | Alavés |
| 07/2003 | | Galder | MF | | Barakaldo CF | Barakaldo CF |
| 07/2003 | | Jorge Sánchez | MF |  | Ciudad de Murcia | Ciudad de Murcia |
| 07/2003 | | Léniz | MF | | Barakaldo CF | Barakaldo CF |
| 07/2003 | | Xabi Sánchez | MF | | Lorca Deportiva | Lorca Deportiva |
| 07/2003 | | Gari Uranga | FW |  | Getafe CF | Getafe |
| 07/2003 | | Miguel | FW |  | Sporting Gijón | Sporting Gijón |