PURPOSE: To provide a pallet transporting device capable of being operated by a simple driving mechanism unnecessitating high precision.

CONSTITUTION: Unassembled workpieces placed on pallets 23 are transported by a carousel to successive work stations WS. The pallets 23 are placed on worktables 22 in each station. The tables 22 and each of the pallets 23 are provided with a registering mechanism, and the workpieces are identically positioned in each station. Robotic welding or the like requiring a high degree of repetitive precision is performed at each station to fabricate the workpieces into finished or semi-finished end products. Both the depositing of the pallets on and lifting them from the worktable are performed at a creep speed i.e., slow speed.