Disclosed herein is an orthopedic knee joint brace, which permits smooth
knee exercise, increases the durability of a spring, and ensures
structural rigidity in a shock absorbing operation. To this end, the
orthopedic knee joint brace includes an upper cuff assembly (100) having
an anatomical shape of a thigh to support the thigh, and a lower cuff
assembly (200) provided under the upper cuff assembly and spaced apart
from the upper cuff assembly. The orthopedic knee joint brace includes a
pair of damping pivot assemblies (300) coupling facing ends of both sides
of the upper and lower cuff assemblies to each other. Each of the damping
pivot assemblies has a multiple pivot link structure and a guide damping
structure to correspond to the movement of the knee joint.