| Competition: | IX Torneo Argentino A |
| Season: | 2003–04 |
| Winners: | Racing (C) (2nd divisional title) |
| Promoted: | Racing (C) |
| Relegated: | Almirante Brown (A) Gimnasia y Esgrima (M) 13 de Junio (P) |
| Prevseason: | 2002–03 |
| Nextseason: | 2004–05 |
The 2003–04 Argentine Torneo Argentino A[1] was the ninth season of third division professional football in Argentina. A total of 20 teams competed; the champion was promoted to Primera B Nacional.
| Club | City | Stadium | |
|---|---|---|---|
| Aldosivi | Mar del Plata | José María Minella | |
| Almirante Brown | Arrecifes | Estadio Municipal | |
| Douglas Haig | Pergamino | Miguel Morales | |
| Guillermo Brown | Puerto Madryn | Raul Conti | |
| Villa Mitre | Bahía Blanca | El Fortín |
| Club | City | Stadium | |
|---|---|---|---|
| Cipolletti | Cipolletti | La Visera de Cemento | |
| Gimnasia y Esgrima | Mendoza | Víctor Antonio Legrotaglie | |
| Independiente Rivadavia | Mendoza | Bautista Gargantini | |
| Juventud Unida Universitario | San Luis | Mario Diez | |
| Luján de Cuyo | Luján de Cuyo | Jardín del Bajo |
| Club | City | Stadium | |
|---|---|---|---|
| 13 de Junio | Pirané | Pirané | |
| Ben Hur | Rafaela | Parque Barrio Ilolay | |
| General Paz Juniors | Córdoba | General Paz Juniors | |
| Racing | Córdoba | Miguel Sancho | |
| Unión | Sunchales | La Fortaleza |
| Club | City | Stadium | |
|---|---|---|---|
| Atlético Tucumán | Tucumán | Monumental José Fierro | |
| Gimnasia y Tiro | Salta | Gigante del Norte | |
| La Florida | La Florida | Capitán Jaime Solá | |
| Ñuñorco | Monteros | Ñuñorco | |
| Talleres | Perico | Plinio Zabala |
In every round the bye team played against the bye team of the other zone: Team from Zone A vs Team from Zone B and Team from Zone C vs Team from Zone D.
In every round the bye team played against the bye team of the other zone: Team from Zone A vs Team from Zone B and Team from Zone C vs Team from Zone D.
|-!colspan="5"|Relegation/promotion playoff 1|-!colspan="5"|Relegation/promotion playoff 2