A joint support adjustable mechanism is provided, including a base, two connectors and a positioning mechanism. The base has a center and two side walls which are opposite to each other and disposed in interval. At least one said side wall is provided with multiple recessed teethes. Each said connector is provided for being connected with a limb of a human body. The positioning mechanism has a fixing member arranged between the two side walls and at least one adjustable mechanism connected with the base. Each said adjustable mechanism has a positioning assembly which is provided for being operated from outside to rotate about the center. At least one of the position assembly and the fixing member is magnetic so as to attract the other and further to make the positioning assembly has the tendency to move toward the center.本發明關於一種關節支架可調裝置。該關節支架可調裝置包括一基座、二連接件及一定位機構。該基座具有一中心及二相對且間隔之側壁,至少一該側壁貫設有複數齒凹。各該連接件供與人體之肢體相連結。該定位機構具有一設於該二側壁之間的固定件、及至少一連接該基座之調整機構,各該調整機構具有一供外界操作而可繞該中心移動的定位組件,該定位組件與該固定件至少其中一者具有磁性而可磁吸另一者,進而使該定位組件具有朝向該中心移動之趨勢。1‧‧‧關節支架可調裝置2‧‧‧基座21‧‧‧第一組件22‧‧‧第二組件23‧‧‧連接部27‧‧‧角度刻度3‧‧‧連接件42‧‧‧調整機構
