The invention relates to a device for keeping the mouth of a patient suffering from snoring problems closed or half-closed, said device being formed by two parts (1) and (2), the first part being fitted around the lips or mouth of the user by means of a strip of adhesive or glue, while the second part (2) is to be fixed, also by means of a strip of adhesive or glue, to the nose of the same user (4). The concentric area (5) of the first part (1) is free of adhesive or glue and is provided with openings (6) to allow the expulsion of air but not inhalation.