There is disclosed a carding engine guard arrangement comprising a carding engine (10) having a longitudinal axis, and respective guards (11) arranged along each side of the carding engine (10), in which at least one of the guards comprises a support structure (25) arranged along one side of the carding engine (10), and a door arrangement (12) pivotally mounted on the support structure (25) to pivot about a substantially horizontal hinge axis (13, 17, 20) at or near to the upper edge of the door arrangement between a closed position guarding the side of the carding engine and a raised position allowing full access to the carding engine throughout its length, when the latter is inoperative. In a preferred arrangement, the door arrangement comprises upper and lower door panels (14 and 15) in which lower panel (15) is first hinged upwardly about its upper edge (16), and thereafter the overlapping door panels (14 and 15) are hinged together upwardly as a unit about the upper hinge axis (13, 17, 20) to the raised access position.