Provided is an inner bite ring which can be used by wearing a glove on a finger wearing the inner bite ring, is unlikely to damage the glove, and does not damage tissue around an oral cavity or teeth even if it is bitten from over the glove, for maintaining an opening and guarding the finger. An inner bite ring 1 has: a tubular portion 2 into which a finger of a human hand is inserted, the glove being worn on the inner bite ring 1 worn on the finger； a soft elastic portion 3 coated on an outer periphery of the tubular portion 2； and a strap portion 4 connected to a root portion 2b side of the tubular portion 2 and hung on a wrist or an adjacent finger. The tubular portion 2 is closed at its tip, and has a vent hole 6 formed on a tip portion side to communicate an inside and an outside of the tubular portion 2.
