The invention relates to a hybrid transmission for a motor vehicle having a heat engine and a driving electrical machine (7), comprising two concentric primary shafts (1, 6), each of which has at least one intermediate drive (4, 8, 9) on a secondary shaft (10) connected to the wheels of the vehicle, characterized in that the transmission has a first means (5) for coupling the two primary shafts (1, 6) together, said means being capable of assuming at least three positions, i.e. a position in which: the heat engine is separated from the drive train connecting the electrical machine (7) to the wheels (position 1); the heat engine drives the wheels with or without the assistance of the electrical machine (position 2); and the heat engine and the electrical machine (7) are coupled together so as to add to the respective torques thereof to the wheels (position 3).