the invention concerns a forced convection gas oven wherein a globally parallelepiped muffle chamber contains a centrifugal convection turbine driven by a motor and arranged adjacent to the center of the rear peripheral wall . a gas burner is arranged coaxially upstream of the turbine , the assembly being surrounded by a mechanical protection grid . the gas burner is annular in shape and is oriented towards the center of the convection turbine . the oven is thus provided both with a better performance and a better distribution of cooking heat .