A hook structure includes a base and a movable hook which is fixed on the base and is provided with a hook board and a hook board seat that are mutually assembled. An elastic member is provided between the hook board and the hook board seat. By the elastic member, when the hook is collided by an external force, the elastic member will operate the hook board to be ejected back, allowing the present invention to be provided with an advantage of a hidden-type and collision-proofed hook.