A kind of gas control positioning joint protector includes a bracket, two air bags and two gas control units. The bracket is fixed on the limbs of patient, and has and face each other and respectively for two stationary planes of limbs joint. Stationary plane of the equal air bags respectively in connection with the what bracket. The grade gas controls unit is separately mounted to the air bag, and guides ambient atmos and enter the air bag, and the gas guided in the air bag is discharged outside to. Thereby, by the grade gas controls unit be adjusted gas saturation in the grade air bags in the way of and the grade air bags there is light weight, the characteristic pressed, so that the bracket is applicable in the joint size of different patients, and then promotion locating effect with the grade air bags.一種氣控定位關節護具，包含一支架、二氣囊，及二氣控單元。該支架固定在患者的肢體，並具有相互面對且分別面向肢體關節的二固定面。該等氣囊分別結合於該支架的固定面。該等氣控單元分別安裝在該氣囊，且導引外界氣體進入該氣囊，及導引該氣囊內的氣體排出至外界。藉此，利用該等氣控單元可調節該等氣囊內氣體飽和度的方式，及該等氣囊具有輕量、均壓的特性，使該支架能夠以該等氣囊適用不同患者的關節尺寸，進而提升定位效果。
