The objective is to provide a stopper housing case formed with a hard material to house a plurality of stoppers for defining a drill blade entering depth. The stopper has a cylindrical shape to be fitted on a drill from the blade edge side of a blade part. The drill is to bore a dental implant fixture embedding hole at a jawbone when performing a dental implant treatment. The stopper has a spring-like locking part to be locked with a flange part projected from a shank part of the drill. The stopper housing case 1 is configured with concave parts 2 which are provided in parallel and capable of respectively housing the stopper Y. Each of the concave parts 2 includes a flange part insertion path 3 formed at one side. The flange part insertion path 3 has a size which prevents the spring-like locking part of the stopper Y from falling out and is capable of inserting a flange part projected from a shank part of the drill X. Each of the concave part 2 is further includes a drill blade part insertion path 4 at another side opposite to the one side. The drill blade part insertion path 4 is capable of inserting the blade part of the drill X.
