A cable management apparatus is arranged between two slide assemblies, each including a first rail fixed to and equipment rack and a second rail slidably coupled to the first rail. The cable management apparatus includes a foldable arm assembly, and a supporting member. Opposite ends of the arm assembly are correspondingly connected to the first rail and the second rail of one of the sliding assemblies. The supporting member includes a supporting rail to support the arm assembly, thereby preventing the arm assembly from sagging. The supporting rail is angled to an extending direction of the sliding assemblies, with a first end of the supporting rail connected to the first rail of one of the slide assemblies, and a second end arranged behind the first end of the supporting rail and connected to the first rail of the other slide assembly.