A mower used in agriculture and connected to lifting arms in a tractor or a corresponding equipment carrier, having a large working width and comprising a load-bearing frame (1) to which two mowing units (2, 3) are fastened by swivel joints by means of lifting booms (9, 10) and swivel shafts (18, 19) substantially parallel to the driving direction, each of which mowing units is provided with at least one mowing beam and whereby each end of the mowing units facing each other in the working position is provided with controlling limiters (16, 17) adapted to one another and positioned above the cutting plane but below the hitch links of the mowing units.