The upper limb positioning aid comprises a connecting rod, an arm supporting frame pivoted on the front end of the connecting rod, a hinge structure mounted on the front end of the upper arm supporting frame, and an arm supporting frame mounted on the front end of the hinge structure. The upper arm support frame and the forearm support frame are respectively provided with a first reset structure and a second reset structure, and the first reset structure and the second reset structure are used to relieve the burden of the low tension user lifting the arm. A positioning device is coupled between the connecting rod and the upper arm support frame to selectively define the upper arm support frame relative to the connecting rod to limit the upper arm of the user to a fixed angle.一種上肢擺位輔具係包含有一連接桿、一樞設於連接桿前端之上臂支撐架、一裝設於上臂支撐架前端之鉸鏈結構以及一裝設於鉸鏈結構前端之前臂支撐架。該上臂支撐架與前臂支撐架上係分別裝設有一第一復位結構以及一第二復位結構，利用該第一復位結構與第二復位結構減緩低張力使用者舉臂時之負擔。 該連接桿與該上臂支撐架間係裝設有一定位裝置，藉以選擇性地相對於該連接桿定為該上臂支撐架，而將使用者的上臂限制於一固定的角度上。
