To easily position a desk by forming dovetail grooves on the right and left side frames of a partition panel, unreleasably inserting brackets into the dovetail grooves in the wall face direction of the partition panel, and fixing the brackets to leg bodies directly or indirectly.

Dovetail grooves 14 opened in the wall face direction of a partition panel and entering in the inner direction of the partition panel are formed on the right and left side frames 11 of the partition panel to be extended over the whole vertical length of the right and left side frames 11. Pawls 60 to be inserted into the dovetail grooves 14 of the right and left side frames 11 are folded and formed on brackets 59 so as to engulf the exterior board 10 of the partition panel. Side pieces 59a overlapped on the inside pieces 57b of covers 57 are folded and formed at the portions opposite to the pawls 60 of the brackets 59, and the side pieces 59a and the inside pieces 57b of the covers 57 are unreleasably fastened with screws 61 screwed from the portions between both leg bodies 4.