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 , 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 (Pe1) and a toothed wheel (Re1) that are coupled, the toothed wheel (Re1) being placed above the pinion (Pe1) and having a radius greater than the pinion (Pe1), the toothed wheel (Re1) meshing with an input pinion rotating around the shaft of the rotor , the toothed wheel (Re1) being arranged above said poles bearing the coils , all the shafts 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 bearing two toothed wheel/pinion assemblies rotating around said shaft , 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 (Pe1) 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 (Pe1) and a toothed wheel (Re1) that are coupled, the toothed wheel (Re1) being placed above the pinion (Pe1) and having a radius greater than the pinion (Pe1), the toothed wheel (Re1) meshing with an input pinion rotating around the shaft of the rotor , the toothed wheel (Re1) being arranged above said poles bearing the coils , all the shafts 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 bearing two toothed wheel/pinion assemblies rotating around said shaft , 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 (Pe1) 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. <EOS>