An electromechanical actuator (10; 110; 210) for an occultation or solar protection device, the occultation or solar protection device comprising at least: - a screen, - a top bar, - a bottom bar, - a top winding shaft (12a; 112a; 212a), and - a bottom winding shaft (12b; 112b; 212b), the screen being arranged between the top and bottom bars (8a, 8b), the top bar being connected to the top winding shaft (12a; 112a; 212a), via first cords, and the bottom bar being connected to the bottom winding shaft (12b; 112b; 212b), via second cords, the electromechanical actuator (10; 110; 210) further comprising: - a first transmission device (21a; 121a; 221a), and - a second transmission device (21b; 121b; 221b), characterized in that the electromechanical actuator (10; 110; 210) comprises a single electric motor (18; 118; 218), the electric motor (18; 118; 218) being configured to drive the top and bottom winding shafts (12a, 12b; 112a, 112b; 212a, 212b), in that the first transmission device (21a; 121a; 221a) is connected, on the one hand, to the electric motor (18; 118; 218) and, on the other hand, to the top winding shaft (12a; 112a; 212a), in that the second transmission device (21b; 121b; 221b) is connected, on the one hand, to the electric motor (18; 118; 218) and, on the other hand, to the bottom winding shaft (12b; 112b; 212b), in that the first transmission device (21a; 121a; 221a) comprises a first clutch (24a; 124a; 224a), in that the second transmission device (21b; 121b; 221b) comprises a second clutch (24b; 124b; 224b), in that, when the electric motor (18; 118; 218) is electrically activated and only one of the first and second clutches (24a, 24b; 124a, 124b; 224a, 224b) is engaged, only one of the top and bottom winding shafts (12a, 12b; 112a, 112b; 212a, 212b) is rotated by the electric motor (18; 118; 218), and in that, when the electric motor (18; 118; 218) is electrically activated and the first and second clutches (24a, 24b; 124a, 124b; 224a, 224b) are engaged, the top and bottom winding shafts (12a, 12b; 112a, 112b; 212a, 212b) are rotated by the electric motor (18; 118; 218). the occultation or solar protection device comprising at least: - a screen, - a top bar, - a bottom bar, - a top winding shaft (12a; 112a; 212a), and - a bottom winding shaft (12b; 112b; 212b), - a screen, - a top bar, - a bottom bar, - a top winding shaft (12a; 112a; 212a), and - a bottom winding shaft (12b; 112b; 212b), the screen being arranged between the top and bottom bars (8a, 8b), the top bar being connected to the top winding shaft (12a; 112a; 212a), via first cords, and the bottom bar being connected to the bottom winding shaft (12b; 112b; 212b), via second cords, the electromechanical actuator (10; 110; 210) further comprising: - a first transmission device (21a; 121a; 221a), and - a second transmission device (21b; 121b; 221b), - a first transmission device (21a; 121a; 221a), and - a second transmission device (21b; 121b; 221b), characterized in that the electromechanical actuator (10; 110; 210) comprises a single electric motor (18; 118; 218), the electric motor (18; 118; 218) being configured to drive the top and bottom winding shafts (12a, 12b; 112a, 112b; 212a, 212b), in that the first transmission device (21a; 121a; 221a) is connected, on the one hand, to the electric motor (18; 118; 218) and, on the other hand, to the top winding shaft (12a; 112a; 212a), in that the second transmission device (21b; 121b; 221b) is connected, on the one hand, to the electric motor (18; 118; 218) and, on the other hand, to the bottom winding shaft (12b; 112b; 212b), in that the first transmission device (21a; 121a; 221a) comprises a first clutch (24a; 124a; 224a), in that the second transmission device (21b; 121b; 221b) comprises a second clutch (24b; 124b; 224b), in that, when the electric motor (18; 118; 218) is electrically activated and only one of the first and second clutches (24a, 24b; 124a, 124b; 224a, 224b) is engaged, only one of the top and bottom winding shafts (12a, 12b; 112a, 112b; 212a, 212b) is rotated by the electric motor (18; 118; 218), and in that, when the electric motor (18; 118; 218) is electrically activated and the first and second clutches (24a, 24b; 124a, 124b; 224a, 224b) are engaged, the top and bottom winding shafts (12a, 12b; 112a, 112b; 212a, 212b) are rotated by the electric motor (18; 118; 218).