A tracheal tube is provided with: a tube body (2) in which a tip (8) and a base end (11) are connected via a curved section (10) and a cuff (3) fitted on the outer peripheral surface of the tube body (2). At a position closer to the base end (11) side than the cuff (3), a suction lumen (12), which extends along the central axis (O1) of the inner peripheral surface of the tube body (2), is connected to the outside through a suction opening (12b) that penetrates from an inner-wall opening (26) formed in the inner wall of the suction lumen (12) to an outer-wall opening (27) formed in the outer peripheral surface. The suction opening (12b) is formed such that, from the viewpoint of a point on the straight line connecting two third top parts (73) at which a first notch (61) and a second notch (62) intersect, a second angle, which is formed by a cross-section orthogonal to the central axis (O1) and a straight line connecting the third top parts (73) to a top part at which the second notch (62) intersects the outer peripheral surface, is smaller than a first angle, which is formed by a cross-section orthogonal to the central axis (O1) and a straight line connecting the third top parts (73) to a top part at which the first notch (61) intersects the outer peripheral surface.Le tube trachéal de linvention est équipé dun corps principal de tube (2) reliant une partie extrémité avant (8) et une partie extrémité de base (11) via une partie courbe (10), et dun ballonnet (3) installé sur une face périphérique externe dudit corps principal de tube (2). Une lumière daspiration (12) se prolongeant suivant une ligne axiale centrale (O1) dune face périphérique interne dudit corps principal de tube (2), communique avec lextérieur via un orifice daspiration (12b) traversant dune ouverture de paroi interne (26) formée dans la paroi interne de ladite lumière daspiration (12) jusquà une ouverture de paroi externe (27) formée dans ladite face périphérique externe, en une position du côté de
