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 an inlet surface in which the supply airflow or the discharge airflow flows and an outlet surface from which the supply airflow or the discharge airflow flows out formed on a side surface thereof; a filter covering the inlet surface; and a positioning member to position the heat exchanger and the filter, the positioning member being fixed to the main body inside the main body; characterized in that: the positioning member includes a fixed plate portion fixed to the main body inside the main body, and a standing plate portion provided to stand from the fixed plate portion, an end portion of the standing plate portion, opposite the fixed plate portion, is bent, a corner portion of the heat exchanger between the inlet surface and the outlet surface abuts on one surface side of the bent portion of the standing plate portion, and the filter abuts on another surface side of the bent portion of the standing plate portion so as to be positioned. 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 an inlet surface in which the supply airflow or the discharge airflow flows and an outlet surface from which the supply airflow or the discharge airflow flows out formed on a side surface thereof; a filter covering the inlet surface; and a positioning member to position the heat exchanger and the filter, the positioning member being fixed to the main body inside the main body; characterized in that: the positioning member includes a fixed plate portion fixed to the main body inside the main body, and a standing plate portion provided to stand from the fixed plate portion, an end portion of the standing plate portion, opposite the fixed plate portion, is bent, a corner portion of the heat exchanger between the inlet surface and the outlet surface abuts on one surface side of the bent portion of the standing plate portion, and the filter abuts on another surface side of the bent portion of the standing plate portion so as to be positioned. the positioning member includes a fixed plate portion fixed to the main body inside the main body, and a standing plate portion provided to stand from the fixed plate portion, a fixed plate portion fixed to the main body inside the main body, and a standing plate portion provided to stand from the fixed plate portion, an end portion of the standing plate portion, opposite the fixed plate portion, is bent, a corner portion of the heat exchanger between the inlet surface and the outlet surface abuts on one surface side of the bent portion of the standing plate portion, and the filter abuts on another surface side of the bent portion of the standing plate portion so as to be positioned.