A tracheal tube includes an airway tubular body, an inflatable cuff disposed on the airway tubular body, a suction conduit extending along the airway tubular body to terminate at a suction opening, and a guiding unit disposed on the airway tubular body and adjacent to the suction opening. The guiding unit includes at least one guiding member having a plurality of ribs. Each two adjacent ones of the ribs define a guiding groove that extends toward the suction opening and that terminates at a confluent region in fluid communication with the suction opening so as to guide secretions in the trachea to the suction opening.
