The present invention relates to a mouthpiece for vocal breathing training, and more particularly, simple breathing training by inserting an elastic body on the left and right sides of the mouthpiece, as well as vocal training with the mouth and mouth open, or vocal training while moving the oral cavity using the elastic body. It relates to a mouthpiece for vocal breathing training that can be done. The present invention is made of an arcuate structure with an open rear and a vent hole formed in the front of the mouthpiece body; a pair of insertion holes provided on the left and right inner surfaces of the mouthpiece body; It is detachably fitted into the insertion hole and placed between the upper and lower teeth to prevent the mouthpiece body from falling out of the user's mouth, but when the user applies pressure with the upper and lower teeth, it contracts and returns to its original state when the pressure is released. It is characterized in that it includes an elastic body that enables various vocal breathing while opening and closing the mouth even while wearing the mouthpiece body.
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