A combination bed includes a bed unit (20), and a wheelchair unit (10) separable from the bed unit. The bed unit includes a first main body part, a first seating surface part (24) attached to the first main body part, and a U-shaped member (211) located below the first seating surface part and attached to the first main body part. The wheelchair unit includes a second main body part (11), a second seating surface part, a first armrest, and a second armrest. The second seating surface part (12) is attached to the second main body part. The first armrest (14) is vertically slidable and attached to a first lateral surface, which faces the bed unit when the bed unit and the wheelchair unit are being combined, of the second main body part. The second armrest (13) is vertically slidable and attached to a second lateral surface, opposite the first lateral surface, of the second main body part. When the bed unit and the wheelchair unit are being combined and the first armrest that is lowered, the U-shaped member is capable of placing a portion of the first armrest therein.
