To easily obtain a truck with its bed plate in different sizes.

Engagement projection parts 7 are provided on a front face wall part 5 and a right side face wall part 6, and engagement recessed parts 12 and slits 13 are provided on a rear face wall part 9 and a left side face wall part 11 in a block 101 for a truck is formed of resin. The engagement projection parts 7 and the engagement recessed parts 12 of the blocks 101 for the truck, with caster mounting parts 21 of block body parts 1 mounted with casters 14, are longitudinally/laterally connected via the slits 13 within the same flat surface to form the truck 201 having the bed plate 28 in a predetermined size. The truck 201 comprising the bed plate 28 in the optimal size for placed articles can be easily obtained by increasing or decreasing the number of connection of the blocks 101 for the truck.