To provide a truck conveying device capable of efficiently working without disturbing working by reducing a number of energy supplying system to be a simple structure.

This device comprises a conveying chain 12 placed on a line and multiple working trucks 14 connected to the conveying chain 12 and made removable on the line with following the conveying chain 12. The conveying chain 12 is provided with a compressed air partitioning hose 42 going to a jig 32 connected to an air compressor 36 so as to be movable with the conveying chain 12, and each working truck 14 is provided with a jig connecting part 34 connected to the compressed air partitioning hose 42.