The utility model relates to a driving aid, which comprises a frame, which is provided with a front axle tube, a horizontal axle tube and at least a vertical axle tube.The front axle tube is provided with a steering handle which is connected with a front fork to control the steering of the front wheel. The steering handle is provided with a first bending mechanism which can pivot towards the frame.Two ends of the horizontal axle tube are respectively provided with a rear wheel, each rear wheel is respectively inserted into the horizontal axle tube with its axle and fixed with a fixed mechanism； the two rear wheels can select the depth of axle insertion, and then adjust the track width between the two rear wheels.The vertical shaft tube is provided for a seat frame to be inserted in it with a support rod detachable. The support rod is provided with a second bending mechanism to make the seat frame pivot towards the frame for folding purpose.一種助行車，包括有一車架，其設有一前軸管、一橫軸管及至少一立軸管。前軸管中穿設有一轉向把手，並連接一前叉而可控制前輪轉向，此轉向把手設有一第一彎折機構而可朝車架樞擺。橫軸管之兩端分別設有一後輪，各後輪分別以其輪軸插入橫軸管中並以一固定機構固定；兩後輪可選擇輪軸插入的深度，進而調整兩後輪之間的輪距。立軸管供一座椅架以一支撐桿可拆離地插設於其中，此支撐桿設有一第二彎折機構，使座椅架朝車架樞擺，以達收折目的。
