PURPOSE: To omit a blast fan on incorporation into the apparatus of a heat- exchange ventilating fan, and to simplify and miniaturize structure by generating an air current flowing through a ventilation flue by turning and driving a heat exchanger body.

CONSTITUTION: When a driving motor 6 is driven, the heat exchanger proper 16 is turned. Consequently, since each heat-exchange wall 19 is also turned and said heat-exchange walls 19 function as the blades of a centrifugal fan, air in the first and second ventilation flues 20, 21 flows out of first and second outflow ports 25, 26 while flowing in the ventilation flues 20, 21 from first and second inflow ports 22, 24. Accordingly, the air of outdoors A is sucked into the ventilation flue 20 as shown in the arrow D, and discharged to indoors B from a discharge port 15. The air of indoors B is sucked into the second ventilation flue 21 as shown in the arrow E at the same time as the discharge of said air, and discharged to the outdoor A side through the second outflow port 26 and an exhaust path 5.