A folding wheelchair.Includes a back support.A seat part pivoted to the back bracket,A front foot pivoted to the seat,And two handrails pivoted with the back bracket.Two first connecting rods are pivoted between each handrail and the seat part.Causing the seat part to pivot between the first position at an angle (approximately vertical) to the back support and the second position substantially parallel to the back support,The wheelchair further comprises two second connecting rods pivoted between the front foot and the back bracket and two extension arms respectively fixed on the two second connecting rods.When the seat is in the first position, the auxiliary wheels of each extension arm are located at the rear of each rear wheel.When the seat is in the second position, the front wheels are not aligned with the rear wheels.And each auxiliary wheel pivots to the front of each rear wheel.Support wheelchair to stand.一種可收折的輪椅，包括一個背部支架，與背部支架樞接的一個座椅部，與座椅部樞接的一個前腳部，以及與背部支架樞接的兩支扶手桿，在各扶手桿與座椅部之間樞設兩支第一連桿，造成座椅部可在與背部支架成一角度（大約垂直）的第一位置以及大致上與背部支架平行的第二位置之間樞轉，輪椅進一步包括樞接在前腳部與背部支架之間的兩支第二連桿以及分別固定在兩支第二連桿上的兩支延伸臂，在座椅部位於第一位置時各延伸臂具有的輔助輪位於各後輪的後方，在座椅部位於第二位置時各前輪與各後輪不對齊，且各輔助輪樞轉至各後輪的前方，支撐輪椅站立。
