PURPOSE: To provide an apparatus capable of automatically reversing a product such as a glass ground stopper having a small diameter portion and a large diameter portion, and again returning the same in the initial posture to a conveyor.

CONSTITUTION: A pair of endless belts 11 for clamping the small diameter portion 2 of a product 1 from both sides and holding the same are provided above a conveyor 20 for transporting the product 1. A take-in belt 13 for clamping the large diameter portion 3 of the product 1 from both sides and lifting the same is provided on the rising side of the endless belt 11. A take-out belt 16 for clamping the large diameter portion 3 of the product 1 from both sides and returning the same onto the conveyer 20 is provided on the lowering side of the belt 11.