Abstract: The present invention relates to a cage device inserted between adjacent vertebral bodies to be used for anterior vertebral body fusion. The cage device includes: a cage; and a staple fixing the cage between adjacent vertebral bodies, in which the staple is configured to include an upper fixed arm extending toward a back surface of the cage while being spaced apart from an upper surface of the cage, a lower fixed arm extending toward the back surface of the cage while being spaced apart from a lower surface of the cage, and a support part fixing the fixed arms to a front surface of the cage and ruggedness is formed on any one of upper and lower surfaces of the upper fixed arm 22 and the lower fixed arm 23.