To prevent a cover member attached to a bracket for supporting a top plate from interfering with an action mechanism, an operation lever, etc., equipped on a table, to improve the beauty, and to make the cover member simply attachable/detachable to and from the support bracket.
An engaging hole 11 is bored in a hung piece 10 of a support bracket 7 to support a top plate 14 of a table, a cover main body 22 of a cover member 21 is covered on the outside face of the hung piece 10, the periphery part of the dangling piece 10 is covered by an edge piece 23 extended inward from the periphery part of the cover main body 22, an engaging protrusion 26 facing the cover main body 22 side is protruded from an upward facing piece 25 extended upward from the inside edge part of the edge part 23, and the engaging protrusion 26 is engaged with the engaging hole 11 from the inside of the hung piece 10. Thus the cover member 21 is attached to the hung piece 10.