A heat-exchange type ventilation apparatus comprising: a main body in which a supply air path and a discharge air path are formed, the supply air path comprising an exterior inlet portion to admit outside air and an interior outlet portion to discharge the outside air, the discharge air path comprising an interior inlet portion to admit inside air and an exterior outlet portion to discharge the inside air; an air supplying fan placed in the supply air path; an air discharging fan placed in the discharge air path; a heat exchanger to allow heat exchange between a supply airflow passing through the supply air path and a discharge airflow passing through the discharge air path, the heat exchanger including a plurality of sheet-like partition members stacked with spacing therebetween so as to have a polygonal prismatic shape, the heat exchanger having a supply air inlet surface, in which the supply airflow flows, and a discharge air inlet surface, in which the discharge airflow flows and which is adjacent to the supply air inlet surface, formed as adjacent side surfaces; a supply air filter covering the supply air inlet surface; a discharge air filter covering the discharge air inlet surface; and a positioning member fixed inside the main body and including a heat-exchanger positioning portion, a supply-air-filter positioning portion, and a discharge-air-filter positioning portion that are integrally formed with one another, the heat-exchanger positioning portion retaining a corner portion of the heat exchanger between the supply air inlet surface and the discharge air inlet surface to position the heat exchanger, the supply-air-filter positioning portion retaining the supply air filter to position the supply air filter, the discharge-air-filter positioning portion retaining the discharge air filter to position the discharge air filter, wherein the heat-exchange type ventilation apparatus further includes a heat insulating portion between a facing surface of the positioning member that faces the main body and the main body, characterized in that the positioning member is fixed with a screw inserted from outside of the main body, the positioning member has a screw hole into which the screw is screwed, in the facing surface, a boss portion that projects towards the main body is formed in the facing surface of the positioning member, and the screw hole is formed in the boss portion. a main body in which a supply air path and a discharge air path are formed, the supply air path comprising an exterior inlet portion to admit outside air and an interior outlet portion to discharge the outside air, the discharge air path comprising an interior inlet portion to admit inside air and an exterior outlet portion to discharge the inside air; an air supplying fan placed in the supply air path; an air discharging fan placed in the discharge air path; a heat exchanger to allow heat exchange between a supply airflow passing through the supply air path and a discharge airflow passing through the discharge air path, the heat exchanger including a plurality of sheet-like partition members stacked with spacing therebetween so as to have a polygonal prismatic shape, the heat exchanger having a supply air inlet surface, in which the supply airflow flows, and a discharge air inlet surface, in which the discharge airflow flows and which is adjacent to the supply air inlet surface, formed as adjacent side surfaces; a supply air filter covering the supply air inlet surface; a discharge air filter covering the discharge air inlet surface; and a positioning member fixed inside the main body and including a heat-exchanger positioning portion, a supply-air-filter positioning portion, and a discharge-air-filter positioning portion that are integrally formed with one another, the heat-exchanger positioning portion retaining a corner portion of the heat exchanger between the supply air inlet surface and the discharge air inlet surface to position the heat exchanger, the supply-air-filter positioning portion retaining the supply air filter to position the supply air filter, the discharge-air-filter positioning portion retaining the discharge air filter to position the discharge air filter, wherein the heat-exchange type ventilation apparatus further includes a heat insulating portion between a facing surface of the positioning member that faces the main body and the main body, characterized in that the positioning member is fixed with a screw inserted from outside of the main body, the positioning member has a screw hole into which the screw is screwed, in the facing surface, a boss portion that projects towards the main body is formed in the facing surface of the positioning member, and the screw hole is formed in the boss portion.