Additions
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 01/2004 |  | Víctor Marchesini | MA | |||
| 01/2004 |  | Melgar | MF |  | CD Castellón | CD Castellón |
| 08/2003 | | Claudio Enría | FW |  | Gimnasia de La Plata | GyE La Plata |
| 08/2003 | | Lucas Alessandría | DF |  | Lanús | Lanús |
| 07/2003 | | Martín Vitali | DF |  | Racing Club | Racing Club |
| 07/2003 | | Juan Pietravallo | MF |  | Olimpo de Bahía Blanca | Olimpo |
| 07/2003 | | Bernardo Leyenda | GK |  | Vélez Sarsfield | Vélez Sársfield |
| 07/2003 | | José Chamot | DF |  | AC Milan | AC Milan |
| 07/2003 | | Federico Domínguez | DF |  | Independiente | Independiente |
| 07/2003 | | Javi González | DF | |||
| 07/2003 | | Javier Mustafá | DF |  | Real Valladolid | Valladolid |
| 07/2003 | | Mauro Navas | DF |  | RCD Espanyol | RCD Espanyol |
| 07/2003 | | Saufán | DF | |||
| 07/2003 |  | Francisco Arrué | MF | |||
| 07/2003 | | Julio | MF | |||
| 07/2003 | | Santiago Kuhl | MF |  | FC Baden | FC Baden |
| 07/2003 | | Claudio Marini | MF |  | CD Numancia | Numancia |
| 07/2003 | | Nicolás Medina | MF |  | Sunderland AFC | Sunderland |
| 07/2003 | | Municio | MF |  | CD Alavés B | CD Alavés B |
| 07/2003 | | Pedro Marcos | MF | |||
| 07/2003 | | Pablo Rodríguez | MF |  | OGC Nice | Nice |
| 07/2003 | | Salazar | MF | |||
| 07/2003 | | Tito | MF | |||
| 07/2003 | | Txiki | MF |  | CD Calahorra | CD Calahorra |
| 07/2003 | | Borja | FW | |||
| 07/2003 | | Mario Turdó | FW |  | Stade Rennais | Stade Rennais |
| 07/2003 | | Carlos Aimar | MA |
Departures
| from | Name | Pos | Team | Team | ||
|---|---|---|---|---|---|---|
| 03/2004 | | Juan Pietravallo | MF | | Gimnasia de La Plata | GyE La Plata |
| 01/2004 | | Federico Domínguez | DF |  | Santos Laguna | Santos Laguna |
| 01/2004 | | Pintado | FW |  | UE Figueres | UE Figueres |
| 01/2004 | | Clotet | DF |  | Xerez CD | Xerez |
| 07/2003 | | Fede Bahón | DF |  | Pontevedra CF | Pontevedra CF |
| 07/2003 | | Gustavo | DF |  | Algeciras CF | Algeciras CF |
| 07/2003 | | Lambea | DF |  | SD Eibar | Eibar |
| 07/2003 | | Óscar | DF |  | Cultural Leonesa | CD Leonesa |
| 07/2003 | | Salva | DF |  | Alicante CF | Alicante CF |
| 07/2003 |  | David Darmon | MF |  | Elche CF | Elche CF |
| 07/2003 | | Gámiz | MF |  | SD Ponferradina | Ponferradina |
| 07/2003 | | Pulido | MF | | CD Numancia | Numancia |
| 07/2003 | | Unai Emery | MF |  | Lorca Deportiva | Lorca Deportiva |
| 07/2003 | | Espinosa | FW |  | CF Palencia | CF Palencia |
| 07/2003 |  | Abas Lawal | FW |  | Albacete | Albacete |
| 07/2003 | | Miguel Ángel | FW |  | Getafe CF | Getafe |
| 07/2003 | | Ramón | FW |  | CF Talavera | Talavera |
| 07/2003 | | Sívori | FW |  | FC Cartagena | Cartagena |
| 07/2003 | | Villa | FW |  | Córdoba CF | Córdoba |
| 07/2003 |  | Pierre Webó | FW |  | CA Osasuna | Osasuna |