The invention relates to a folding device (10) for transporting an outer cardboard package (20) having folding lines and for folding at least one side flap (21) of the outer cardboard package (20). The folding device (10) comprises at least one conveyor system with a guiding unit (11) and with at least two transporting and folding shuttles (30) disposed on the guiding unit (11) for the transport of the outer cardboard packages (20) in a transport direction (TR). The at least two shuttles (30) are disposed in a row at the conveyor system and are transported in a transport direction (TR) through and/or by the conveyor system. Each shuttle (30) comprises its own, individually controllable drive (32) and further at least one folding unit (35) for folding over at least one side flap (21) of an outer cardboard package (20).