To provide an object support device for enabling a carrier to independently load an object on a carrying device, while restraining a work burden and work cost by a simple constitution and technique, and an object carrying method capable of stably carrying the object by using this object support device.

This object support device 10 is interposed between an arranging surface for arranging the object 80 and the object 80, and supports the object 80 from below. The object support device 10 includes a fluid storage part 12 including a plurality of fluid storage bodies for injecting fluid inside and having object support fluid storage bodies 12-1(12-2) for supporting the object by presenting a solid shape in which at least one unit among the fluid storage bodies has a desired height by injection of the fluid, a communicating tube 20 for mutually communicating a plurality of fluid storage bodies of the fluid storage part 12, and an opening-closing mechanism 22 for opening-closing the communicating tube. The fluid injected into the fluid store bodies becomes quantity for filling the object support fluid storage bodies 12-1(12-2).