A gear motor consisting of a casing comprising a brushless motor having at least two electrical phases and a rotor rotating around a shaft and being composed of a stator assembly having at least two poles each bearing coils (11,12), the winding axes of which are spaced apart by a mechanical angle of less than 180° and extend radially, and of a gear train, the gear train comprising: - a first shaft placed in the angular space formed between the two poles, said first shaft bearing a first assembly formed by a pinion and a toothed wheel that are coupled, the toothed wheel being placed above the pinion and having a radius greater than the pinion, the toothed wheel meshing with an input pinion rotating around the shaft of the rotor, the toothed wheel being arranged above said poles bearing the coils (11, 12), all the shafts (4, 5, 6, 7) of the gear train being parallel to one another and parallel to the shaft of the rotor, characterized in that the gear train has at least one shaft (4, 5) bearing two toothed wheel/pinion assemblies rotating around said shaft (4, 5), the gear train comprises at least four reduction stages, the shaft bearing two toothed wheel/pinion assemblies is not the motor shaft, - the gear train comprises a second shaft supporting a second and a third pinion/toothed wheel assembly, namely an upper assembly and a lower assembly, respectively, that are free in relative rotation, - said second upper assembly is formed by a wheel (Re2h) and a pinion (Pe2h), - said third lower assembly is formed by a wheel (Re2b) and a pinion (Pe2b), - the gear train comprises a third shaft supporting: - a fourth assembly formed by a wheel (Re3h) and a pinion (Pe3h), and in that - said wheel (Re2h) of said second upper assembly meshes with the pinion of said first assembly, - said pinion (Pe2h) of said second upper assembly meshes with said wheel (Re3h) of said fourth assembly, - said pinion (Pe3h) of said fourth assembly meshes with the wheel (Re2b) of said third assembly. - a first shaft placed in the angular space formed between the two poles, said first shaft bearing a first assembly formed by a pinion and a toothed wheel that are coupled, the toothed wheel being placed above the pinion and having a radius greater than the pinion, the toothed wheel meshing with an input pinion rotating around the shaft of the rotor, the toothed wheel being arranged above said poles bearing the coils (11, 12), all the shafts (4, 5, 6, 7) of the gear train being parallel to one another and parallel to the shaft of the rotor, characterized in that the gear train has at least one shaft (4, 5) bearing two toothed wheel/pinion assemblies rotating around said shaft (4, 5), the gear train comprises at least four reduction stages, the shaft bearing two toothed wheel/pinion assemblies is not the motor shaft, - the gear train comprises a second shaft supporting a second and a third pinion/toothed wheel assembly, namely an upper assembly and a lower assembly, respectively, that are free in relative rotation, - said second upper assembly is formed by a wheel (Re2h) and a pinion (Pe2h), - said third lower assembly is formed by a wheel (Re2b) and a pinion (Pe2b), - the gear train comprises a third shaft supporting: - a fourth assembly formed by a wheel (Re3h) and a pinion (Pe3h), and in that - said wheel (Re2h) of said second upper assembly meshes with the pinion of said first assembly, - said pinion (Pe2h) of said second upper assembly meshes with said wheel (Re3h) of said fourth assembly, - said pinion (Pe3h) of said fourth assembly meshes with the wheel (Re2b) of said third assembly.