To dispense with strict positioning and dispense with fitting for positioning and an electric recognition means by improving a connection means of a truck and a driving vehicle.

This is a truck conveyance device in which a driving vehicle 2 slips under a truck to connect it with the truck for conveyance. A locking pin is provided in a lower part of the truck, and a locking plate 12 capable of rising and lowering is provided in the driving vehicle 2. A pin receive hole 13 which receives the locking pin and has such area that can absorb positioning error of the truck and a pin locking hole 14 which is continuously brought into contact with both front and rear ends of the pin receive hole 13 to lock the locking pin are formed on the locking plate 12.