2003–04 Primera B Nacional
| Season | 2003–04 |
|---|---|
| Champions | Instituto (2nd divisional title) |
| Promoted | Instituto Almagro Argentinos Juniors Huracán (TA) |
| Relegated | Gimnasia y Esgrima (CdU) Los Andes |
| Top goalscorer | AP: Julio Bevacqua 13 goals CL: Luis Tonelotto 12 goals |
← 2002–03 2004–05 → | |
The 2003–04 Argentine Primera B Nacional was the 18th season of second division professional football in Argentina. A total of 20 teams competed; the champion and runner-up were promoted to Argentine Primera División.