A steering device for a towed vehicle comprising at least one steered axle (101, 101'), and in particular a rear steered axle positioned substantially at the rear of said towed vehicle according to its longitudinal direction, with an axis (102, 102') receiving two wheels at its longitudinal ends: a right wheel (103, 103') and a left wheel (104, 104'), each steerable relative to said axis (102, 102') respectively about a first axis (Z1, Z1') substantially vertical to the towed vehicle and a substantially vertical second axis (Z2, Z2') of the towed vehicle, as well as a drawbar intended to pivotably link said towed vehicle to a towing vehicle about a substantially vertical articulation axis of the towed vehicle, and in particular at a towing hitch of the towing vehicle, the steering device including: - a hydraulic distributor with a hydraulic rotary motor, in particular of the ORBITROL type, intended to be secured to the towed vehicle, and in particular at or proximate to the drawbar, with a casing and an input gear rotatable relative to said casing, a first fluid outlet orifice and a second fluid outlet orifice, the hydraulic distributor being configured to control the fluid outlet at the first orifice or at the second orifice according to the rotation of the input pinion relative to the casing, - at least one hydraulic actuator (31, 32), in particular intended to be secured to the steered axle (101, 101') of the towed vehicle, and intended to be linked to at least one wheel (103, 103', 104, 104') of the steered axle (101, 101') of the towed vehicle, so as to cause the pivoting of said wheels (103, 103', 104, 104') relative to said axis (102, 102') of the steered axle (101, 101') respectively about said first axis (Z1, Z1') and the second axis (Z2, Z2'), and connected to the first and to the second oil outlet orifice of the hydraulic distributor, so that its fluid supply through said first orifice causes the pivoting of the right wheel (103, 103') and of the left wheel (104, 104') relative to said axis in a first direction of rotation, respectively about said first axis (Z1, Z1') and the second axis (Z2, Z2'), and that its fluid supply through said second orifice causes the pivoting of the right wheel (103, 103') and of the left wheel (104, 104') relative to said axis (102, 102') in a second direction of rotation, opposite to the first direction of rotation, respectively about said first axis (Z1, Z1') and the second axis (Z2, Z2'), - a control system linked to the input pinion of the hydraulic distributor and intended to be also linked to the towing vehicle, and in particular at or proximate to its towing hitch, to which the towed vehicle is linked, and configured so as to cause the rotation of the input gear relative to the casing of the hydraulic distributor during cornering of the towing vehicle to which the towed vehicle is linked, and in order to force the orientation of the wheels (103, 103', 104, 104') of the steered axle (101, 101') of the towed vehicle relative to the axis (102, 102'), respectively about said first axis (Z1, Z1') and the second axis (Z2, Z2') according to the orientation of the towed vehicle relative to the towing vehicle about the articulation axis. - a hydraulic distributor with a hydraulic rotary motor, in particular of the ORBITROL type, intended to be secured to the towed vehicle, and in particular at or proximate to the drawbar, with a casing and an input gear rotatable relative to said casing, a first fluid outlet orifice and a second fluid outlet orifice, the hydraulic distributor being configured to control the fluid outlet at the first orifice or at the second orifice according to the rotation of the input pinion relative to the casing, - at least one hydraulic actuator (31, 32), in particular intended to be secured to the steered axle (101, 101') of the towed vehicle, and intended to be linked to at least one wheel (103, 103', 104, 104') of the steered axle (101, 101') of the towed vehicle, so as to cause the pivoting of said wheels (103, 103', 104, 104') relative to said axis (102, 102') of the steered axle (101, 101') respectively about said first axis (Z1, Z1') and the second axis (Z2, Z2'), and connected to the first and to the second oil outlet orifice of the hydraulic distributor, so that its fluid supply through said first orifice causes the pivoting of the right wheel (103, 103') and of the left wheel (104, 104') relative to said axis in a first direction of rotation, respectively about said first axis (Z1, Z1') and the second axis (Z2, Z2'), and that its fluid supply through said second orifice causes the pivoting of the right wheel (103, 103') and of the left wheel (104, 104') relative to said axis (102, 102') in a second direction of rotation, opposite to the first direction of rotation, respectively about said first axis (Z1, Z1') and the second axis (Z2, Z2'), - a control system linked to the input pinion of the hydraulic distributor and intended to be also linked to the towing vehicle, and in particular at or proximate to its towing hitch, to which the towed vehicle is linked, and configured so as to cause the rotation of the input gear relative to the casing of the hydraulic distributor during cornering of the towing vehicle to which the towed vehicle is linked, and in order to force the orientation of the wheels (103, 103', 104, 104') of the steered axle (101, 101') of the towed vehicle relative to the axis (102, 102'), respectively about said first axis (Z1, Z1') and the second axis (Z2, Z2') according to the orientation of the towed vehicle relative to the towing vehicle about the articulation axis.