| 摘要 |
PROBLEM TO BE SOLVED: To provide a mouth piece for a facial muscle training tool, capable of making a loading of a weight part effectively act as a burden on a mouth-held portion, and enabling obtaining a training effect for the facial muscle.SOLUTION: Weight parts 25 are provided on the end parts of right and left arms 31. A mouth-held portion 24 held by the lips is provided between both arms 31. A downward bending rate in a resting state of both arms 31 is set to exceeding 4.8%. |
