Race Result
| GP n. 299 - 29/01/1978 - Grand Prix of Brazil Jacarepagua |
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| Winner: | Carlos Reutemann / Ferrari - 1:49'59.86 | ||||||
| Pole Position: | Ronnie Peterson / Lotus-Ford - 1:40.45 | ||||||
| Fastest Lap: | Carlos Reutemann / Ferrari - 1:43.07 | ||||||
| Pos | Nš | Driver | Constructor | Laps | Time/Retired | Grid | Points |
| 1 | 11 |  Carlos Reutemann |
Ferrari | 63 | 1:49'59.86 | 4 | 9 |
| 2 | 14 |  Emerson Fittipaldi |
Fittipaldi-Ford | 63 | + 49.13 | 7 | 6 |
| 3 | 1 |  Niki Lauda |
Brabham-Alfa Romeo | 63 | + 57.02 | 10 | 4 |
| 4 | 5 |  Mario Andretti |
Lotus-Ford | 63 | + 1'33.12 | 3 | 3 |
| 5 | 17 |  Clay Regazzoni |
Shadow-Ford | 62 | + 1 lap | 15 | 2 |
| 6 | 3 |  Didier Pironi |
Tyrrell-Ford | 62 | + 1 lap | 19 | 1 |
| 7 | 9 |  Jochen Mass |
ATS-Ford | 62 | + 1 lap | 20 | 0 |
| 8 | 2 |  John Watson |
Brabham-Alfa Romeo | 61 | + 2 laps | 21 | 0 |
| 9 | 26 | Jacques Laffite |
Ligier-Matra | 61 | + 2 laps | 14 | 0 |
| 10 | 36 |  Riccardo Patrese |
Arrows-Ford | 59 | + 4 laps | 18 | 0 |
| 11 | 27 |  Alan Jones |
Williams-Ford | 58 | + 5 laps | 8 | 0 |
| Ret | 25 |  Hector Rebaque |
Lotus-Ford | 40 | physical | 22 | 0 |
| Ret | 12 |  Gilles Villeneuve |
Ferrari | 35 | spun off | 6 | 0 |
| Ret | 8 | Patrick Tambay |
McLaren-Ford | 34 | spun off | 5 | 0 |
| Ret | 7 | James Hunt |
McLaren-Ford | 25 | spun off | 2 | 0 |
| Ret | 16 | Hans Joachim Stuck |
Shadow-Ford | 25 | fuel system | 9 | 0 |
| Ret | 20 |  Jody Scheckter |
Wolf-Ford | 16 | accident | 12 | 0 |
| Ret | 6 |  Ronnie Peterson |
Lotus-Ford | 15 | collision | 1 | 0 |
| Ret | 22 | Danny Ongais |
Ensign-Ford | 13 | brakes | 23 | 0 |
| Ret | 30 | Brett Lunger |
McLaren-Ford | 11 | overheating | 13 | 0 |
| Ret | 4 | Patrick Depailler |
Tyrrell-Ford | 8 | accident | 11 | 0 |
| Ret | 18 | Rupert Keegan |
Surtees-Ford | 5 | accident | 24 | 0 |
| Dnq | 24 | Divina Galica |
Hesketh-Ford | did not qualify | 0 | ||
| Dnq | 37 | Arturo Merzario |
Merzario-Ford | did not qualify | 0 | ||
| Dnq | 19 | Vittorio Brambilla |
Surtees-Ford | did not qualify | 0 | ||
| Dnq | 32 | Eddie Cheever |
Theodore-Ford | did not qualify | 0 | ||
| Dns | 23 | Lamberto Leoni |
Ensign-Ford | 0 | transmission | 17 | 0 |
| Dns | 10 | Jean Pierre Jarier |
ATS-Ford | did not start | 16 | 0 | |