Provided is a corrector for preventing thumb sucking. The corrector comprises a finger insertion part, and a joining part formed on one side of the finger insertion part. The finger insertion part includes an internal sheet, an external sheet, and a waterproofing sheet interposed between the internal sheet and the external sheet. The corrector of the present invention reduces an infant&primes behavior of sucking a thumb, and improves sense of wearing throughout the region of the finger coming in contact with the corrector by having excellent air permeability and absorptivity.COPYRIGHT KIPO 2016손가락 삽입부 및 상기 손가락 삽입부의 일단에 형성된 체결부를 포함하고, 상기 손가락 삽입부는 내부시트, 외부시트, 및 상기 내부시트와 외부시트에 개재된 방수시트를 포함하는 손가락 빨기 교정기를 제공한다.
