A locking device is disclosed for use with a resilient flexible endostomal tracheostoma button. Commonly used trachostoma buttons include a retaining lip situated at one end of a cylindrical portion that is insertable into the stoma of the patient and serves to retain the button in position in the stoma. The locking device invention is a hollow cylindrical tube that is removably inserted into the tracheostoma button after insertion of the tracheostoma button into the patients stoma. One end of the locking device includes an insertion stop radial protrusion for proper positioning of the locking device within the button. The locking device internally supports the walls and retaining lip of the tracheostoma button and substantially increases the retaining force of the lip, thereby reducing awkward ejection of the tracheostoma tube, such as during patient coughing.
