Provided is a medical device whereby a burden placed on a patient in spinal deformity surgery is alleviated while facilitating the surgery. A medical device in which a chest unit 5A for supporting the chest of a patient 2 and a pelvic unit 5B for supporting the pelvis of the patient 2 are disposed side by side on a base 10, the medical device being provided with a first shifting device 15, 16 for shifting the chest unit 5A in a first direction closer to or away from the pelvic unit 5B, and a second shifting device 25, 46 for shifting either the chest unit 5A or the pelvic unit 5B in a horizontal direction orthogonal to the first direction with respect to the other of the chest unit 5A or the pelvic unit 5B.
