Abstract: A ventilation unit includes a fixing member coupled to an exhaust tube, through which exhaust gas is discharged, a discharge cap portion including a hollow discharge flange portion coupled to the fixing member, and a discharge cone portion extending from the discharge flange portion and having a narrow upper side and a wide lower side, a finish cap portion including a hollow finish flange portion arranged to be spaced from the discharge flange portion, a finish cone portion extending from the finish flange portion and having a narrow upper side and a wide lower side, and a finish plate portion closing the upper end of the finish cone portion, and a spacing member for fixing the discharge cap portion and the finish cap portion to be spaced from each other, wherein the discharge cone portion overlaps with the finish cone portion.