To easily and safely move furnishings such as furniture or the like inside a room.

At least three or more casters 2 are projectingly attached on the bottom surface side of a top plate 1 for mounting a mounting object 9 such as the furniture or the like on an upper surface and this base is made movable on a floor surface. In this case, the casters 2 are the casters with a locking device 3 for locking rolling freely movable in multiple directions and at least three or more legs 7 projected higher than a caster height in a projected state are elevatably, lowerably and foldably attached on the back surface of the top plate 1.