PURPOSE: To prevent a shelf board from being decreased in strength, and also from jumping out when it is in use by providing an intermediate sash bar provided with a shelf support receiver for going over to a back board, for the rear section of a mullion, and meanwhile installing a shelf support dowel to a side board.

CONSTITUTION: An intermediate sash bar 3 is provided in such a manner that at least a shelf support receiver 3a is located in the inner direction of an area in the width direction of a mullion 2, and let the back face of the mullion 2 act as a shelf support stopper. Meanwhile, a shelf support dowel 5 is installed onto a side board. A resting method of a shelf 4 by means of the mullion 2 and the intermediate sash bar 3 is employed, a shelf board 4 is rested on the shelf support receiver 3a to be provided to the intermediate sash bar 3, and since the shelf support receiver 3a is provided to the inner side of an area in the width direction of the mullion, the mullion 2 itself functions as a shelf support stopper, the shelf board 4 will never jump forward when housed articles are taken in/out. There is no need for providing a dowel fitting hole for the shelf board 4, and degradation in the strength of the shelf board can thereby be prevented. Beside, no interruption is made in a space for housing sections, the housed articles can be internally moved with ease, and since the whole of an inner section can be seen, the housed article can be identified with ease.