A storage system in a ceiling space includes overhead traveling vehicles and a traveling route for the same, a shuttle carriage configured to transport goods to and from processing devices and a traveling route for the same, an OHT port to and from which the overhead traveling vehicles and the shuttle carriage both transport goods, and buffers that are provided in the ceiling space above the processing device and are for the placement of goods by the shuttle carriage. The traveling route for the shuttle carriage enables delivery and reception of goods by the shuttle carriage between the load port of the processing devices, the buffers, and the OHT port.