Additions
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 01/2004 |  | Andrija Delibašić | FW |  | Partizan | Partizan |
| 01/2004 |  | Edu Moya | DF |  | CD Tenerife | Tenerife |
| 01/2004 | | Iván Ramis | DF |  | RCD Mallorca B | Mallorca |
| 01/2004 |  | Guillermo Pereyra | MF |  | River Plate | River Plate |
| 01/2004 |  | Finidi George | FW |  | Ipswich Town | Ipswich |
| 10/2003 | | Luis Aragonés | MA | |||
| 10/2003 | | Llompart | MA | |||
| 09/2003 |  | Nenê | MF |  | Santos FC | Santos FC |
| 08/2003 | | Nagore | MF |  | Atlético Madrid | Atlético |
| 08/2003 |  | Jovan Stanković | MF | | Atlético Madrid | Atlético |
| 07/2003 |  | Arnold Bruggink | MF |  | PSV Eindhoven | PSV Eindhoven |
| 07/2003 | | Colsa | MF |  | Real Valladolid | Valladolid |
| 07/2003 | | Enric Pi | MF | | RCD Mallorca B | Mallorca |
| 07/2003 |  | Martín Ligüera | MF |  | Fénix | Fénix |
| 07/2003 | | Rafita | MF | | RCD Mallorca B | Mallorca |
| 07/2003 | | Toni González | MF | | RCD Mallorca B | Mallorca |
| 07/2003 | | Fernando Correa | FW | | Atlético Madrid | Atlético |
| 07/2003 | | Perera | FW |  | Albacete | Albacete |
| 07/2003 |  | Jaime Pacheco | MA |  | Boavista | Boavista |
Departures
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 05/2004 | | Toni González | MF |  | Ciudad de Murcia | Ciudad de Murcia |
| 02/2004 | | Alberto Cifuentes | GK | | Ciudad de Murcia | Ciudad de Murcia |
| 01/2004 | | Raúl Martín | MF | | CD Tenerife | Tenerife |
| 01/2004 | | Martín Ligüera | MF |  | Grasshopper Club Zürich | Grasshoppers |
| 08/2003 | | Ariel Ibagaza | MF | | Atlético Madrid | Atlético |
| 08/2003 | | Álvaro Novo | MF | | Atlético Madrid | Atlético |
| 07/2003 | | Ángel | DF |  | Córdoba CF | Córdoba |
| 07/2003 | | Albert Riera | MF |  | Girondins de Bordeaux | Bordeaux |
| 07/2003 |  | Harold Lozano | MF |  | CF Pachuca | Pachuca |
| 07/2003 | | Robles | MF | | Ciudad de Murcia | Ciudad de Murcia |
| 07/2003 | | Leonardo Biagini | FW |  | Rayo Vallecano | Rayo |
| 07/2003 | | Carlitos | FW |  | Sevilla FC | Sevilla |
| 07/2003 | | Turu Flores | FW | | Ciudad de Murcia | Ciudad de Murcia |
| 07/2003 | | Walter Pandiani | FW |  | Deportivo A Coruña | Deportivo |
| 07/2003 | | Tuni | FW |  | UD Salamanca | Salamanca |
| 07/2003 | | Gregorio Manzano | MA | | Atlético Madrid | Atlético |