Abstract: A novel holding dock structure for a steel cable shackle of bicycles and particularly to an improved holding dock structure to overcome the disadvantages of conventional steel cable shackle holding apparatus of bicycles that cannot accommodate different specifications of steel cables and result in riding interference caused by unstable holding and dangling of the steel cable shackles mainly includes an anchor dock which is extended to form a post clip with an opening to clamp a post of the bicycle frame. The post clip has side walls extended to form an arm which has an anchoring structure to receive and couple with a guiding arm extending from one end of a movable member. The movable member is slidable freely within the length of the guiding arm and moved in parallel with the arm of the anchor dock to clamp and anchor the steel cable shackle disposed therebetween so that the steel cable shackle is held securely without dropping or dangling.