A workpiece conveying device includes a traveling platform which moves on traveling rails, a workpiece sucker arranged below the traveling platform, a vertical drive guide which is provided on the traveling platform and vertically drives the workpiece sucker, and a fork which is placed on the workpiece sucker so as to sandwich the workpiece sucker. With this structure, effects are obtained such that the workpiece conveying device is capable of achieving space saving in a factory and is capable of improving moving accuracy and increasing a moving speed while making it difficult to damage a product.