Abstract: A fastening structure is adapted for use with both tracheal and endo-tracheal assisted breathing device. The fastening structure provides a fastening ring and a fastening bracket. The fastening structures are adapted for connection to prior art assisted breathing components currently adopted in most medical facilities. In an endo-tracheal application, where the endo-tracheal tube passes through the patient's mouth, first and second fastening rings are attached to the auxiliary port and to the ventilator attachment port, respectively, of the ventilator adaptor. The U-shaped opening of a fastening bracket is passed over the endo-tracheal adapter which is attached to the ventilation adapter. First and second legs, extending from the fastening bracket, lock onto the first and second rings. The connection between the fastening bracket and the fastening rings prevents unwanted separation between the endo-tracheal adapter and the ventilation adapter.