The invention relates to a filling device for filling bags with a respective unsealed upper end and at least two layers lying on top of one another. A filling station for filling the bags in characterised in that the filling device comprises at least one layer movement device (30) for moving the at least one layer of the bag relative to the at least one second layer, with which the layers of the bag can be acted upon, wherein the layer movement device is arranged in front of the filling station.