PROBLEM TO BE SOLVED: To stabilize a wheelchair posture during an ascending / descending motion, to ascend / descend a step in a relatively short time without giving anxiety to a wheelchair occupant, and to allow a wheelchair occupant to step alone. Provide a wheelchair that can be lifted and lowered. SOLUTION: When a wheelchair 1 performs a descending motion from an upper stage 29 to a lower stage 30, the rear arm portion 11 is rotated so that its tip is directed downward, and the forearm portion 16 is rotated so that its tip is directed downward. It is rotated, and the tips of the rear arm 11 and the forearm 16 are rotated in a direction approaching each other, the front wheels 2 and the rear wheels 3 are lifted from the upper stage, and the tips of the rear arm 11 and the forearm 16 are separated from each other. When the front wheels 2 and the rear wheels 3 are brought into contact with the lower stage by rotating in the direction, the inclination of the main body 5 is kept constant by coordinating the rear arm driving unit 12 and the forearm driving unit 17. .. [Selection diagram] Fig. 1【課題】 昇降動作の間も車椅子の姿勢が安定しており、車椅子の搭乗者に不安感を与えることがなく、比較的短い時間で段差を昇降するができ、車椅子の搭乗者が単身で段差昇降操作を行うことができる車椅子を提供する。【解決手段】車椅子１は、上段２９から下段３０に下る降段動作を行うときには、後腕部１１をその先端が下方に向かうように回転させ、前腕部１６をその先端が下方に向かうように回転させるものであり、後腕部１１及び前腕部１６の先端が互いに接近する方向に回転させ、前輪２及び後輪３を上段から持ち上げ、後腕部１１及び前腕部１６の先端が互いに離間する方向に回転させ、前輪２及び後輪３を下段に接地させる際に、後腕駆動部１２と前腕駆動部１７とを協調させることにより本体５の傾きを一定に維持する。。【選択図】図１
