Abstract: The invention relates to a room divider height extension, specifically referring to a kind installed onto an existent lower room divider to increase the original height, with three inverted-U shaped support tabs welded along the bottom edge. Furthermore, there are semicircular tabs protruding from the lower edge of the left and right aforesaid support tabs that are inserted into the U-shaped slots along the upper edge of the existent room divider, and when the room divider height extension and the existent room divider are firmly assembled together, a square tunnel is formed for the placement of electric power lines, telephone lines, computer cables within the improved structure, all of which comprise the primary innovations of the invention herein.