A storage system in a ceiling space for using overhead traveling vehicles to transport goods to processing devices that have load ports, the system comprising: a traveling route (8, 9, 10) for the overhead traveling vehicles; a shuttle carriage that transports goods to and from the processing devices; a traveling route (12, 14) for the shuttle carriage; an OHT port (30, 31) to and from which the overhead traveling vehicles and the shuttle carriage can both transport goods; and buffers that are provided in a ceiling space directly above the processing devices and are for placement of goods by the shuttle carriage, wherein the traveling route (12, 14) for the shuttle carriage is arranged so as to enable delivery and reception of goods by the shuttle carriage among the load ports of the processing devices, the buffers, and the OHT port (30, 31), whereby the traveling route (8, 9, 10) for the overhead traveling vehicles and the traveling route (12, 14) for the shuttle carnage are arranged mutually parallel along a row of the processing devices, the load ports are provided on a passageway side of a front face of the processing devices, two types of OHT ports (30, 31) are provided as the OHT port, namely an OHT port on the passageway side relative to the load ports and an OHT port on a processing device side that is provided in the ceiling space over the processing devices, a traveling route over the passageway for transporting goods to and from the OHT port on the passageway side and a traveling route over the processing devices for transporting goods to and from the OHT port on the processing device side are provided as the traveling route for the overhead traveling vehicles, and a traveling route for transporting goods to and from the load ports and the OHT port on the passageway side, a traveling route for transporting goods to and from the buffers and the OHT port on the processing device side, and a connection portion that connects these traveling routes (12, 14) are provided as the traveling route for the shuttle carriage. a traveling route (8, 9, 10) for the overhead traveling vehicles; a shuttle carriage that transports goods to and from the processing devices; a traveling route (12, 14) for the shuttle carriage; an OHT port (30, 31) to and from which the overhead traveling vehicles and the shuttle carriage can both transport goods; and buffers that are provided in a ceiling space directly above the processing devices and are for placement of goods by the shuttle carriage, wherein the traveling route (12, 14) for the shuttle carriage is arranged so as to enable delivery and reception of goods by the shuttle carriage among the load ports of the processing devices, the buffers, and the OHT port (30, 31), whereby the traveling route (8, 9, 10) for the overhead traveling vehicles and the traveling route (12, 14) for the shuttle carnage are arranged mutually parallel along a row of the processing devices, the load ports are provided on a passageway side of a front face of the processing devices, two types of OHT ports (30, 31) are provided as the OHT port, namely an OHT port on the passageway side relative to the load ports and an OHT port on a processing device side that is provided in the ceiling space over the processing devices, a traveling route over the passageway for transporting goods to and from the OHT port on the passageway side and a traveling route over the processing devices for transporting goods to and from the OHT port on the processing device side are provided as the traveling route for the overhead traveling vehicles, and a traveling route for transporting goods to and from the load ports and the OHT port on the passageway side, a traveling route for transporting goods to and from the buffers and the OHT port on the processing device side, and a connection portion that connects these traveling routes (12, 14) are provided as the traveling route for the shuttle carriage.