A frame includes a base frame that is formed of a framework formed in a substantially rectangular shape by square pipes and is provided with plural cutout portions on the lower surface sides of the square pipes that are long sides of the framework, a bracket that includes a plate section on which a caster is mounted, and in which a portion of the plate section is fitted into the cutout portion, and the caster that is mounted on the plate section and located further to the inside than an outer periphery of the framework when the base frame is viewed from the upper surface side.