The present invention relates to a cap device for closing a hole, particularly a burr hole, in a bone, particularly a skull, of a human or an animal, comprising a frame member for fastening the cap device to the bone, and a cap member for covering the hole. According to the invention, the cap member is integrally connected to the frame member, so that the cap member can be bent away from the frame member, particularly for allowing passage of a catheter through said hole.
