A cable management assembly adapted for first and second slide rail assemblies includes first and second cable management brackets which are connected together, a supporting base, and a supporting member pivotally connected to the supporting base. The first slide rail assembly includes first and second rails. The cable management brackets are connectable to the rails respectively. The supporting base is connectable to the second slide rail assembly. The supporting member has a portion located between the cable management brackets. When the second rail is longitudinally displaced relative to the first rail from a retracted position toward an extended position, the first cable management bracket drives the portion of the supporting member and thereby rotates the supporting member relative to the supporting base.