A cable management apparatus includes a securing board and a cable management tray. The securing board includes three clipping pieces located along a straight line. A clasping portion extends from the securing board and includes a connecting flange and a clasping flange. The connecting flange is substantially perpendicular to the clasping flange and the securing board. The cable management tray defines a first receiving space for receiving a first cable and a second receiving space for receiving a second cable. The cable management tray includes two handles and three securing tabs. The two handles are elastic and engaged with the clasping flange, for preventing the cable management tray from moving along a direction substantially parallel to the securing board. The three securing tabs are engaged with the three clipping pieces, for preventing the cable management tray from moving along a direction substantially perpendicular to the securing board.