Abstract: The invention relates to a device for power-assisted opening/closing of an openable panel in a motor vehicle, comprising: a latch (9) for disengaging/engaging a striker; a pawl (10) able to lock the latch (9) in at least one locked position and release said latch (9); a first kinematic chain (3) for power-assisted closing, of which one end is connected to a motor (1) and the other to said latch (9); and a second kinematic chain (4) for power-assisted opening, of which one end is connected to said motor (1) and the other to said pawl (10); which device is characterized in that said motor (1) comprises a through shaft (2), of which one end forms a driving connection with said first kinematic chain (3) and the other a driving connection with the second kinematic chain (4).