PURPOSE: A chain locker for preventing damage to an inner wall is provided to prevent shaking of a chain since the incident angle of impact applied to the inner wall of a chain locker from a chain decreases by a chain guide unit. CONSTITUTION: A chain locker(10) for preventing damage to an inner wall comprises a chain(11) and a chain guide unit(20). A space(15) is formed on the lower part of the deck of a ship. Chains are stacked in the space. The chain guide unit is formed on the inner wall of the chain locker. The chain guide unit becomes gradually narrow toward the center of the inner floor of the chain locker.
