Abstract: A stainless steel bur is provided which can cut minute depressions and even healthy dentin when necessary, allowing a technician to detect when cutting the healthy dentin. A handle connected to a hand piece on the base side, a working section to which a cutting blade for cutting teeth is attached to the tip, and the working section and the handle are connected to a tapered intermediate section. This steel bur is formed into a fiber structure by hardening austenitic stainless steel. Since the tapered part bends and generates vibrations when the working section is rotated to cut healthy dentin, it can be understood that the healthy dentin is being cut, and excessive cutting may be prevented. Alternatively, excessive cutting may be prevented by processing from the maximum diameter of the working section to the tip thereof through etching to round cutting blade edge and make a blunt edge.