PROBLEM TO BE SOLVED: To provide a safety mouth-opening aid with a grip effective for the treatment to patients such as medical care or for a person who has difficulty in opening his/her mouth.SOLUTION: A tip part of a bitten part (1) is inserted laterally into gaps between teeth and is rotated to be set longitudinally and is set simultaneously to be bitten. The opened mouth is maintained by holding the grip because the mouth is opened while the bitten part is bitten.COPYRIGHT: (C)2015,JPO&INPIT【課題】 この発明は医療などの患者の治療時や、口を開ける事が困難な人に有効な開口補助器である。又、安全性を兼ね備えた取っ手付きの開口補助器に関するものである【解決手段】 咬むパーツ(1)の先端部分を歯と歯の隙間に真横に挿入し、回すように立てると同時に咬ませる。咬んだまま開口するので取っ手を持つて維持します【選択図】図4