A glass substrate transporting apparatus aims to load or unload a quartz bracket into or from multiple reactors. It includes a track, a carriage, a rotary element and a telescopic fetching rack. The reactors are located at two sides of the track. The carriage has four track wheels movable on the track and multiple motors to synchronously drive the four track wheels. The rotary element is located on the carriage. The telescopic fetching rack is located on the rotary element. Through movement of the carriage on the track and rotation of the rotary element, the telescopic fetching rack can sequentially align and enter the reactors to load or unload the quartz bracket, thus amount of the reactors to be utilized is increased and utilization efficiency of the glass substrate transporting apparatus is improved. Moreover, as the carriage can move quickly on the track, production is also increased.