Taking over the place of Armoricaine in the first division of Brittany, the Stadium was promoted in Promotion d'honneur in 1951, in regional honour division (just created) in 1952 before joining the Honour Division (1953). Stade Brestois finally reached the French Amateur Championship (CFA) in 1958, taking advantage of the withdrawal of the Voltigeurs de Châteaubriant. The club is finally evolving at the same level as its rival AS Brest.