PURPOSE: To easily manufacture a shelf device by forming a recessed part on the central part by way of drawing against a rectangular flat plate and by making a brace installation plate by way of forming a connection hole to a support on the bottom plate part of this recessed part and a connection hole for brace on a corner of the rectangular flat plate.

CONSTITUTION: A shelf device 1 on a framework has a plural number of supports 2 erected with specified intervals in the lengthy and the breadthy directions, and the supports 2 in the breadthy direction are connected to each other with a cross beam 5. Additionally, a brace installation plate 20 is provided on the crossing part of the support 2 and the cross beam 5 and a brace 6 is installed in a crossing shape between the corresponding brace installation plates 20. Each of the brace installation plates 20 is acquired by drawing against a rectangular flat plate 21, a recessed part 22 to open to the side of an outer surface is formed on its central part, and it is fixed on the support 2 with a bolt nut 13 by using a connection hole 23 provided on a bottom plate part 21a forming the recessed part 22. Connection holes 24 of the cross beam 5 are formed on both sides of the rectangular flat plate 21 and connection holes 25 for the brace are formed at corner parts respectively.