Suspended bed comprising a lifting mechanism and a device for driving said lifting mechanism, wherein the mechanism comprises a supporting frame to said bed, of rectangular shape, and at least four ropes (21, 22, 23, 24), each of which is secured at its top to a fixed structure, said at least four ropes (21, 22, 23, 24) extended downward until a corresponding edge of the said supporting frame, then to sequentially engage returning rollers, provided in the supporting frame to deflect the same ropes (21, 22, 23, 24) according to a predetermined path which ends with a horizontal portion (21H, 22H, 23H, 24H), displaced below the mentioned supporting frame and almost parallel to the corresponding horizontal portions (21H, 22H, 23H, 24H) of the remaining ropes (21, 22, 23, 24), with all the respective ends bound to a common draw hook, which is provided to be moved together with the same ropes (21, 22, 23, 24), wherein said device comprises: - at least one pulley, rotatably carried by the mentioned supporting frame, with a substantially vertical rotation axis; - a cogwheel, made coaxially integral to said pulley; - a linear drive element, integral with one of its ends with said supporting frame and having associated, at the other end thereof, motion transformation means; - a flexible cable, bound at one end to said pulley and wound about said pulley with a intermediate portion thereof engaged with at least one returning roller arranged downstream and secured with the remaining end to said draw hook of the ropes (21, 22, 23, 24), so that to the rotation of the pulley and of the cogwheel corresponds a driving of the same flexible cable for imparting / enabling to the mentioned draw hook rectilinear movements, respectively in a first direction, in which the same hook and the ropes (21, 22, 23, 24) are pulled to lift said bed, and in an opposite direction, in phase relation with the descent of the same bed, in which to the hook and to the ropes (21, 22, 23, 24) is permitted a return stroke, wherein said motion transformation means consist of at least a second cogwheel substantially coplanar to said cogwheel and having an axis rotatably integral with said supporting frame and of a transmission chain closed in a loop between said at least one second cogwheel and said cogwheel, said second end of said linear drive element being made integral with chain links of said transmission chain, so that the actuation of said linear drive element moves said chain links along the closed path of said transmission chain bringing said cogwheel into rotation, said second cogwheel being arranged in such a way that at least one linear portion of said transmission chain runs parallel to the motion direction of said linear drive element, said motion transformation means comprising a skid, guided to move in a guide rail according to the direction of said linear portion, said skid being integral with said second end of said linear drive element as well as with chain links of said linear portion. - at least one pulley, rotatably carried by the mentioned supporting frame, with a substantially vertical rotation axis; - a cogwheel, made coaxially integral to said pulley; - a linear drive element, integral with one of its ends with said supporting frame and having associated, at the other end thereof, motion transformation means; - a flexible cable, bound at one end to said pulley and wound about said pulley with a intermediate portion thereof engaged with at least one returning roller arranged downstream and secured with the remaining end to said draw hook of the ropes (21, 22, 23, 24), so that to the rotation of the pulley and of the cogwheel corresponds a driving of the same flexible cable for imparting / enabling to the mentioned draw hook rectilinear movements, respectively in a first direction, in which the same hook and the ropes (21, 22, 23, 24) are pulled to lift said bed, and in an opposite direction, in phase relation with the descent of the same bed, in which to the hook and to the ropes (21, 22, 23, 24) is permitted a return stroke, wherein said motion transformation means consist of at least a second cogwheel substantially coplanar to said cogwheel and having an axis rotatably integral with said supporting frame and of a transmission chain closed in a loop between said at least one second cogwheel and said cogwheel, said second end of said linear drive element being made integral with chain links of said transmission chain, so that the actuation of said linear drive element moves said chain links along the closed path of said transmission chain bringing said cogwheel into rotation, said second cogwheel being arranged in such a way that at least one linear portion of said transmission chain runs parallel to the motion direction of said linear drive element, said motion transformation means comprising a skid, guided to move in a guide rail according to the direction of said linear portion, said skid being integral with said second end of said linear drive element as well as with chain links of said linear portion.