The inventive concept relates to a cage inserted between vertebrae, and more particularly, to a cage inserted between vertebrae, which implements an articulated rotary motion and may be stably inserted between vertebrae. A cage inserted between vertebrae according to the inventive concept includes a cage body inserted between vertebrae, and a rotary member connected to the cage body to be rotatable and fastened to an inner rod of a cage inserting apparatus. The rotary member includes a connector connected to the cage body, and a screw thread extending from an end of the connector to protrude toward an outside of the cage body and screw-fastened to the inner rod.
