A structural arrangement of a motor vehicle, of type including a cabin and a loading bed, between which a substantially vertical partition extends, of type including a cabin floor that extends at a first height, and a loading floor of the bed that extends at a second height that differs from the first height of the cabin floor, and of type including a hollow body that stiffens the structure and extends substantially vertically between the first height of the cabin floor and the second height of the loading floor. The hollow body includes two substantially vertical structural elements, and the first structural element is formed by the lower portion of the partition.