PROBLEM TO BE SOLVED: To provide a medical device that can properly measure a center of gravity and prevent overturn of a surgical bed without a significant change in design.SOLUTION: The medical device S with multiple leg parts 20 for lifting up and supporting a body 2 from a floor face includes load detection means 55 provided between the body 2 and each leg part 20 to detect load in a vertical direction that the leg parts 20 receives from the floor face.SELECTED DRAWING: Figure 6