A cable management assembly for mounting to a pair of slide rail assemblies including a first slide rail assembly and a second slide rail assembly and carrying an object, comprising: a first cable management bracket (32, 200) adapted to be connected to the first slide rail assembly; a second cable management bracket (34, 204) pivotally connected to the first cable management bracket (32, 200) and adapted to be connected to the first slide rail assembly; a plurality of cable supporting features connected to the first cable management bracket (32, 200) and the second cable management bracket (34, 204); a supporting base (38, 300, 400) adapted to be connected to the second slide rail assembly; a supporting member configured for supporting at least one of the first cable management bracket (32, 200) and the second cable management bracket (34, 204); and wherein the supporting member has a first end and a second end opposite in position to the first end, wherein the first end of the supporting member is pivotally connected to the supporting base (38, 300, 400) via a pivotal connecting element, such that the supporting member is rotatable relative to the supporting base (38, 300, 400); and the supporting member comprises an upright standing actuator mounted to the supporting member at a position adjacent to the second end and which actuator is located between the first cable management bracket (32, 200) and the second cable management bracket (34, 204); wherein upon relative displacement of the first cable management bracket (32, 200) and the second cable management bracket (34, 204), one of the first cable management bracket (32, 200) and the second cable management bracket (34, 204) drives the supporting member to rotate relative to the supporting base (38, 300, 400), characterized in, that the actuator is driven by the first cable management bracket (32, 200) to rotate the supporting member, such that the supporting member is rotated from an initial position when the first cable management bracket (32, 200) and the second cable management bracket (34, 204) are displaced from a retracted position toward an extended position, and that the actuator is driven by the second cable management bracket (34, 204) to rotate the supporting member, such that the supporting member is displaced toward the initial position when the first and the second cable management bracket (32, 200, 34, 204) are brought closer to each other. a first cable management bracket (32, 200) adapted to be connected to the first slide rail assembly; a second cable management bracket (34, 204) pivotally connected to the first cable management bracket (32, 200) and adapted to be connected to the first slide rail assembly; a plurality of cable supporting features connected to the first cable management bracket (32, 200) and the second cable management bracket (34, 204); a supporting base (38, 300, 400) adapted to be connected to the second slide rail assembly; a supporting member configured for supporting at least one of the first cable management bracket (32, 200) and the second cable management bracket (34, 204); and wherein the supporting member has a first end and a second end opposite in position to the first end, wherein the first end of the supporting member is pivotally connected to the supporting base (38, 300, 400) via a pivotal connecting element, such that the supporting member is rotatable relative to the supporting base (38, 300, 400); and the supporting member comprises an upright standing actuator mounted to the supporting member at a position adjacent to the second end and which actuator is located between the first cable management bracket (32, 200) and the second cable management bracket (34, 204); wherein upon relative displacement of the first cable management bracket (32, 200) and the second cable management bracket (34, 204), one of the first cable management bracket (32, 200) and the second cable management bracket (34, 204) drives the supporting member to rotate relative to the supporting base (38, 300, 400), characterized in, that the actuator is driven by the first cable management bracket (32, 200) to rotate the supporting member, such that the supporting member is rotated from an initial position when the first cable management bracket (32, 200) and the second cable management bracket (34, 204) are displaced from a retracted position toward an extended position, and that the actuator is driven by the second cable management bracket (34, 204) to rotate the supporting member, such that the supporting member is displaced toward the initial position when the first and the second cable management bracket (32, 200, 34, 204) are brought closer to each other.