PROBLEM TO BE SOLVED: To provide a mouth opening training apparatus which makes it possible to arbitrarily adjust a position to impart mouth opening force and the degree of loads and perform fully balanced mouth opening training even when there is a difference in the symptom of trismus between the right and left of the jaw joint.;SOLUTION: The convex surface of a pair of shell shape members having a concave surface and the convex surface with a mouthpiece part at the distal end is made to circumscribe and it is tightened with a rubber band. Thus, the contact of the convex surfaces of the shell shape members is turned to a fulcrum, the mouth opening force can be imparted to the mouthpiece part, and a user can arbitrarily vary the fulcrum.;COPYRIGHT: (C)2009,JPO&INPIT
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