An agricultural machine (1) comprises a frame (2) carrying an arm (5) having first and second ends (6, 7) and being able to occupy a lateral position relative to the frame (2), a first unit (10) being connected at the arm (5) and extending laterally between the first and second ends (6, 7), a second unit (11) being connected to the arm (5) and extending laterally beyond the second end (7) , a device (12) connecting the second unit (11) to the arm (5) in the vicinity of its second end (7) and allowing it to pivot relative to the arm (5) about a second longitudinal axis (13) close the second end (7), a mechanism (14) animating members (15, 16, 17) of the first and second units (10, 11) and being carried by the arm (5) in the vicinity of the second end (7). ). According to the invention, the device (12) connects the first unit (10) to the arm (5) in the vicinity of its second end (7), allows the first unit (10) to pivot at work relative to the arm (5) around a first longitudinal axis (25) close to the second end (7), has an axle (26) facing upwards around which the mechanism (14) is pivotally mounted on the arm (5), and the mechanism (14) and at least one of the first and second units (10, 11) can, in a lateral position of the arm (5) relative to the frame (2), pivot jointly about said axis (26). Une machine (1) agricole comporte un châssis (2) portant un bras (5) ayant des première et deuxième extrémités (6, 7) et pouvant occuper une position latérale relativement au châssis (2), une première unité (10) étant reliée au bras (5) et s'étendant latéralement entre les première et deuxième extrémités (6, 7), une deuxième unité (11) étant reliée au bras (5) et s'étendant latéralement au-delà de la deuxième extrémité (7), un dispositif (12) reliant la deuxième unité (11) au bras (5) au voisinage de sa deuxième extrémité (7) et l'autorisant à pivoter relativement au bras (5) autour d'un deuxième axe (13) longitudinal proche de la deuxième extrémité (7), un mécanisme
