PURPOSE: To obtain a load carrier device correspondent to the division of a feeder rail (trolley).

CONSTITUTION: A feeder rail 12 is divided according to the number of mobile truck 11 that can be fed, and is provided along a running rail at a predetermined interval (t), while two pairs of collector rings 13A, 13B which receive power from the feeder rail 12, are provided in the mobile truck 11, in the direction of the running rail, at no less than the predetermined interval (t), and one collector ring 13A is fed in the mobile truck 11 through a first NFB 14 connected in series, and a resistance 15 as well as a second NFB 16, in order, while the other collector ring 13B is fed in the mobile truck 11 through the second NFB 16. When the truck 11 is moved from the feeder rail 12, the current that runs between each feeder rail 12 is regulated by a resistance 15 in the mobile truck 11 and the generation of the arc between the feeder rail 12 and the collector ring 13 is inhibited thereby. The tripping of the NFB 17 to be fed to the feeder rail 12 that is provided is thus inhibited, while the stopping of the mobile truck is inhibited, and the driving reliability can be improved.