There is provided a tracheal tube that allows improvement in safety. The tracheal tube includes a tube main body, and a cuff that is mounted to the tube main body and has a barrel portion capable of being deflated and inflated. A covering region that covers a tracheal inner wall of a trachea in a state in which the barrel portion is inflated in the trachea has a sealing part that gets contact with the tracheal inner wall seamlessly in a circumferential direction of the barrel portion. The width of at least part of the sealing part is smaller than 1 mm.
