PROBLEM TO BE SOLVED: To provide a cargo box enabling installation/removal of a second story floor if necessary.;SOLUTION: This cargo box, in which the freely removal second story floor is arranged to be lifted/lowered, is provided with a guide rail arranged vertically in a wall part of the cargo box, a slide block housed slidably inside the guide rail, an elevator elevating/lowering the slide block, and an expansion part extending from the slide block to support the second story floor from the lower side. In the double floor arranged movably in the vertical direction in the cargo box, a recess, to which the expansion part can be fitted from the lower side, is formed in the part matching the slide block. In installation of the second story floor inside the cargo box, the expansion part in the slide block is fitted from the lower side to the recess part in the second story floor positioned inside the cargo box.;COPYRIGHT: (C)2004,JPO
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