The brake structure of the walking aid includes a support body extending toward the ground and a plurality of supports, each of which is respectively arranged with a wheel group and a brake assembly. Each brake assembly has a resistance surface, which can be controlled to resist to the corresponding wheel group or ground, thereby generating friction to form the brake.一種助行器剎車結構包括有一支撐本體，其朝地面伸設有複數個支撐件，各支撐件分別與一輪組及一剎車組件對應組設。其中各剎車組件分別具有一抵制面，此抵制面可經控制而抵制於對應之輪組或地面，藉此產生摩擦力而形成剎車。
