PURPOSE: The walking-assistance apparatus is provided to improve a power transmission efficiency by reducing a power transmission distance between a driving part and a joint part, to allow a user to wear the apparatus easily, and to facilitate movement. CONSTITUTION: Upright-walking assistance apparatus (1) comprises a supporting unit that comprises a first supporting part (110) that supports a back of a user, a second supporting part (120) of which one end is connected to the first supporting part and that supports thighs of the user, a third supporting part (130) that is connected to the other end of the second supporting part and supports lower legs of the user, a hip joint part (140) that rotably combines the second supporting part to the first supporting part, and a knee joint part (150) that rotably combines the third supporting part to the second supporting part； a driving motor installed on the first supporting part； a link driving part 220 that is installed on the driving motor and the hip joint part as to rotate the second supporting part by transmitting a rotation force of the driving motor to the second supporting part； a driving unit including a motion transmission part of which one side is interlockingly installed to the link driving part and the other side is installed on the knee joint part such that a rotation force of the driving motor is transmitted to the third supporting part to rotate the third supporting part； a battery supplying power to the driving motor； and a control unit (400) that controls operation of the driving motor.본 발명은 보행 보조장치에 관한 것으로서, 착용자의 허리를 지지하는 제1지지부와, 제1지지부에 일 단이 결합되고 착용자의 대퇴부를 지지하는 제2지지부와, 제2지지부의 타 단에 결합되고 착용자의 하퇴부를 지지하는 제3지지부와, 제1지지부에 대하여 제2지지부를 회전가능하게 결합시키는 고관절부와, 제2지지부에 대하여 제3지지부를 회전가능하게 결합시키는 슬관절부를 포함하는 지지유닛과； 제1지지부에 설치되는 구동모터와, 구동모터의 회전력을 제2지지부로 전달하여 제2지지부를 회전시킬 수 있도록 구동모터와 고관절부에 설치되는 링크구동부와, 구동모터의 회전력을 제3지지부로 전달하여 제3지지부를 회전시킬 수 있도록 일 측은 링크구동부와 연동되게 설치되고 타 측은 슬관절부에 설치되는 동력전달부를 포함하는 구동유닛과； 구동모터에 전원을 공급하는 배터리와； 구동모터의 작동
