A folding device, especially the folding device for folding the working part of an agricultural machine with at least one stationary part (7) and at least one folding part (8) which is mounted on the stationary part (7) by means of two arms (1,2) that are joined to the stationary part (7) and folding parts (8) by four swivel mountings (3,4,5,6) so that in the working position of the folding parts (8), the first arm (1) is placed over the second arm (2) and the swivel mountings (3,4,5,6) are positioned in such a way that the swivel mounting (4) of the second arm (2) is positioned in the stationary part (7) below the level of the swivel mounting (6) of the first arm (1), and the swivel mounting (3) of the second arm (2) is in the folding part (8), located above the level of the swivel mounting (5) of the first arm (1), whereas in the transport mode, the folding parts (8) of the first arm (1) are positioned under the second arm (2) and the swivel mounting (3) of the second arm (2) is positioned in the folding part (8) above the level of the swivel mounting (5) of the first arm (1).
