It is provided so as to be installed on the knee so as to extend the knee joint in the swing phase and includes a knee extension member for maintaining the knee in the stance phase, wherein the knee extension member includes: a knee sleeve surrounding the knee joint; and a knee support chamber that is installed to be connected to the knee sleeve and allows the knee to be stretched by supporting the knee joint when air is introduced and expanded in the swing phase, and maintains the knee in the stance phase A lower extremity robot orthosis for rehabilitation is disclosed.
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