The 2004 Formula 3 Sudamericana season was the 15th Formula 3 Sudamericana season. It began on 24 April 2004, at Autódromo Internacional Nelson Piquet in Brasília and ended on 19 December at Autódromo José Carlos Pace in São Paulo. Brazilian driver Alexandre Sarnes Negrão won the title.
| Team | No | Driver | Chassis | Engine | Rounds |
|---|---|---|---|---|---|
| Class A | |||||
| Cesário Fórmula | 1 |  Alberto Valério | Dallara F301 | Mugen-Honda | 1–7 |
| Berta | 8 | ||||
| 2 | Gustavo Foizer | Dallara F301 | Mugen-Honda | 1–7 | |
| Berta | 8 | ||||
| 3 | Alexandre Foizer | Dallara F301 | Mugen-Honda | 1–7 | |
| Berta | 8 | ||||
| Nasr/Castroneves | 5 | Zeca Cardoso | Dallara F301 | Mugen-Honda | 1–7 |
| Fernando Herrero | Dallara F301 | Berta | 8 | ||
| 6 | Lucas Schowanbach | Dallara F301 | Mugen-Honda | 1 | |
| Avallone Motorsport | 7 | João Barion | Dallara F301 | Mugen-Honda | 1–7 |
| 8 | Jaime Camara | Dallara F301 | Mugen-Honda | 1–7 | |
| Piquet Sports | 9 | Alexandre Sarnes Negrão | Dallara F301 | Mugen-Honda | 1–7 |
| Berta | 8 | ||||
| Basssani Racing | 14 | Henrique Favoretto | Dallara F301 | Opel | 1–7 |
| Berta | 8 | ||||
| Dragão Motorsport | 15 | Salomão Soares | Dallara F301 | Mugen-Honda | 1 |
| Fernando Galera | Dallara F301 | Mugen-Honda | 2 | ||
| PropCar Racing | 16 | André Souza | Dallara F301 | Berta | 8 |
| 17 | Carlos Iaconelli | Dallara F301 | Opel | 1–7 | |
| Berta | 8 | ||||
| 37 |  Pablo Pérez Companc | Dallara F301 | Opel | 1–6 | |
| Full Time | 20 | Marcelo Thomaz | Dallara F301 | Opel | 6 |
| Berta | 8 | ||||
| Casagrande Racing | 34 | Fabio Casagrande | Dallara F301 | Mugen-Honda | 1–2, 5–7 |
| Berta | 8 | ||||
| Class B | |||||
| Cesário Fórmula | 40 | Vinicius Canhedo | Dallara F394 | Mugen-Honda | 1 |
| Bia Figueiredo | Dallara F394 | Mugen-Honda | 2 | ||
| 41 | 1 | ||||
| Andre Prioste | Dallara F394 | Mugen-Honda | 2 | ||
| Marcos Guerra | Dallara F394 | Mugen-Honda | 6–8 | ||
| Casagrande Racing | 43 | William Starostik | Dallara F394 | Mugen-Honda | 7 |
| Paulo Meyer | Dallara F394 | Mugen-Honda | 8 | ||
| Dragão Motorsport | 46 | Maria Cristina Rosito | Dallara F394 | Mugen-Honda | 2 |
| PropCar Racing | 54 | Renan Rizzi | Dallara F394 | Opel | 1 |
| José Pedro Passadore | Dallara F394 | Opel | 8 | ||