To provide a structure for a bed, in which the bed can be safely and speedily moved/conveyed by one person and can be moved along the curve of a small radius.

Wheels 2 for moving are attached through perpendicular rods to four corners of a framework 1, which is a basic structure for the bed. A freely vertically movable lift wheel 3 is attached on a central position in the direction of the width of the framework 1 on the inside surrounded with the wheels 2 for moving on four corners. When the lift wheel 3 is moved up, the wheels 2 for moving on four corners are contacted on the floor and the lift wheel 3 is separated from a floor surface F. When the lift wheel 3 is moved down, among the moving wheels 2, a pair of moving wheels in the direction of the width are floated from the floor surface F.