1978 GP Ouest-France
# 1978 GP Ouest-France

The 1978 GP Ouest-France was the 42nd edition of the GP Ouest-France cycle race and was held on 22 August 1978. The race started and finished in Plouay. The race was won by Pierre-Raymond Villemiane.

## General classification

| Rank | Rider | Time |
| - | - | - |
| 1 | Pierre-Raymond Villemiane (FRA) | 4h 54' 00" |
| 2 | Joop Zoetemelk (NED) | + 0" |
| 3 | Marcel Tinazzi (FRA) | + 25" |
| 4 | Jacques Bossis (FRA) | + 25" |
| 5 | Patrick Busolini (FRA) | + 25" |
| 6 | Hubert Mathis (FRA) | + 54" |
| 7 | André Mollet (FRA) | + 3' 34" |
| 8 | Jean Chassang (FRA) | + 3' 34" |
| 9 | Christian Muselet (FRA) | + 3' 34" |
| 10 | Roland Berland (FRA) | + 3' 34" |
