To provide a carrying device much in the carrying sheet number, capable of carrying a large work, capable of reducing the installation area of the device, and operable in a clean room without generating dust.

Two sets of carrying beams A and B are used for performing walking beam operation, and friction between vertical motion and a work is eliminated by overlapping a constant velocity motion section, and carrying capacity is increased by constituting a carrying passage in a multistage shape. The two carrying devices are arranged in parallel, and when extending the carrying beams, a highly accurate carrying plane can be maintained, to cope with the large work.