PURPOSE: To smoothly perform unloading, by detachably mounting a pressing member, which fills up upper space of a floor sealing brush further presses a brush supporting member to a wall part, to the outside of a load case internal wall by a flat head bolt, in case of the captioned truck for transporting a granule.

CONSTITUTION: A brush supporting member 21, which fixes a brush 20 to be suspended, is detachably fixed being pressed to a mounting part 14, formed in a load case internal wall 11, by a pressing member 26 and a flat head bolt 22. In this way, the pressing member can be mounted both filling up the upper space of the brush 20 and preventing the mounting bolt 22 from protruding its head. Accordingly, a granule can be smoothly unloaded.