A support brace has a conjoining component, an extending component, a guiding set, an adjusting set, and an operating set. The guiding set has a guiding pole mounted to the conjoining component. The adjusting set is mounted to the extending component and has an adjusting sheet with a through hole located around and engaged with the guiding pole. The operating set has a pressing pole able to press the adjusting sheet and to disengage the through hole of the adjusting sheet and the guiding pole, and make the extending component to which the adjusting set is mounted moveable relative to the conjoining component along a moving direction. The support brace is longitudinally adjustable, is suitable for different limb lengths, and is able to reduce cost of casting orthopedic cast and purchasing appliances of orthotics of different sizes.一種醫療輔具支架，包括有一基座、一延長座及一連接裝置，該連接裝置裝設於該基座與該延長座之間，使該延長座可相對於該基座沿一方向移動。該連接裝置包括有一連接桿、一調整單元及一押桿單元，其中該調整單元套設於該連接桿上，該押桿單元用以按押調整單元；於自然狀態時，該調整單元的第一彈性元件對調整片施力並受到限位部限制，使調整片傾斜卡制於連接桿上；當對押桿單元施力時，該押桿單元按押調整單元的調整片並使調整片與連接桿徑向平行，使調整單元可相對於連接桿移動，藉由上述技術手段達到調整基座及延長座的相對位置。
