A hook for hanging an object using cantilever force is disclosed, and the hook includes a main body and a hook body. The hook body extends from the main body and includes a hook portion and a free end portion. The hook portion has an inner curved surface facing and close to the main body, and the free end portion is connected to the hook portion and has a blocking segment. A largest distance between the inner curved surface and the main body is configured to accommodate an object to be hung on the hook body, and the hook body is horizontally configured with respect to the ground when the main body is attached to a fixture.