The present invention includes a conveyor body which partitions a plurality of storage chambers, a connection opening connected to an external device, and a conveying chamber that connects the plurality of storage chambers to the connection opening, a plurality of incubators detachably stored in the plurality of incubators, a conveyor device that conveys one of the plurality of incubators from the storage chamber to the connection opening, and an environment control device that individually controls an interior environment of the plurality of incubators by supplying and discharging gas to and from each incubator.