PROBLEM TO BE SOLVED: To realize a folding function without increasing the number of parts and weight and to maintain safety by maintaining a space between a pair of main frames in a vehicle width direction. SOLUTION: A pair of rear wheels 30, a pair of seat surface frames 52a, a pair of main frames 51, and a pair of main frames 51 are arranged in a vehicle width direction at a first spacing and a pair at which a user can sit. The main frame includes a folding mechanism 90 capable of switching to a second interval in which the main frames are close to each other. The folding mechanism 90 has a pair of first arm portions 91a and 91b and rotates the pair of first arm portions 91a and 91b. A wheelchair 100 configured to be attached to a cross frame 91 rotatably connected to an axis X3 and a pair of first arm portions 91a and 91b. [Selection diagram] Fig. 6【課題】部品点数や重量を増加させることなく折り畳み機能を実現するとともに一対の主フレームの車幅方向の間隔を維持して安全性を高めること。【解決手段】一対の後輪３０と、一対の座面フレーム５２ａと、一対の主フレーム５１と、一対の主フレーム５１の車幅方向の間隔を使用者が着座可能な第１間隔と一対の主フレームが近接した第２間隔とに切り替え可能な折り畳み機構９０と、を備え、折り畳み機構９０は、一対の第１アーム部９１ａ，９１ｂを有し一対の第１アーム部９１ａ，９１ｂを回動軸Ｘ３に対して回動可能に連結したクロスフレーム９１と、一対の第１アーム部９１ａ，９１ｂに取り付けられる構成となっている車椅子１００。【選択図】図６
