Abstract: The present invention provides a multifunction bed that has a simple structure to allow its size to be reduced and that can be automatically changed between a bed form and a wheelchair form using very simple operations. This multifunction bed comprises a fixed U-shaped bed 1 having a U-shaped cut-out section 6 and a movable auxiliary bed 2 that is detachably fitted in the U-shaped cut-out section of the fixed U-shaped bed. The movable auxiliary bed can travel on underlying wheels 14 and 16 and can be changed between a bed form for a horizontal position and a wheelchair form having a backrest section 19, a seat section 20, and a leg-rest section 21.