Heat exchange ventilator

A heat exchanger ventilation device comprises: a case (1) comprising an air supply channel and an air exhaust channel; an air supply blower (11) that is disposed in the air supply channel and that generates an air supply flow to the air supply channel; an air exhaust blower (12) that is disposed in the air exhaust channel and generates an air exhaust flow to the air exhaust channel; a heat exchanger (2) that performs heat exchange between the air supply flow and the air exhaust flow by way of intersecting the air supply channel and the air exhaust channel; and a drain pan (20) that accepts the condensation from the heat exchanger (2). The drain pan (20) comprises a supply-side drain pan that is disposed on the discharge-side of the air supply flow in the heat exchanger (2), an exhaust-side drain pan that is disposed on the discharge-side of the air exhaust flow in the heat exchanger (2), and a water channel that connects the supply-side drain pan and the exhaust-side drain pan. The exhaust-side drain pan comprises a drain outlet (21) that drains condensation to the outside of the case (1).