Disclosed is a cable tray. According to an embodiment of the present invention, the cable tray comprises: side rails on both sides; and a rung connecting a space between the side rails and having a cable stacked on an upper part. The side rail includes: an upper plate unit having a plane with a certain width; a lower plate unit facing the upper plate unit; and a vertical connection unit connecting the upper plate unit and the lower plate unit. The vertical connection unit is folded to have a flat unit and a vertical unit in a position which is connected to the rung.
