A heat-exchange type ventilation apparatus comprising: a main body in which a supply air path to supply outside air to indoors and a discharge air path to discharge inside air to outdoors are provided; a heat exchanger placed in the main body 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 and polygonal shaped partition members stacked with spacing therebetween; an air supplying fan placed in the main body to generate the supply airflow; an air discharging fan placed in the main body to generate the discharge airflow; and a filter (5, 6) in which a filter main body is accommodated in a hollow portion of a filter frame that has a rectangular shape in front view, the filter (5, 6) being provided on a supply-airflow inflow side and a discharge-airflow inflow side of the heat exchanger, wherein the filter frame is configured by an integrally-molded single member, the filter frame includes a first rib connecting top surfaces of two longer edge portions (111a, 111c) which face one another on the supply-airflow inflow side or the discharge-airflow inflow side, second ribs, each of which connects two adjacent edge portions that define a corresponding one of at least two corner portions that are adjacent to each other in a direction of elongation of a shorter edge portion (111b, 111d) on the supply-airflow inflow side or the discharge-airflow inflow side, and a plurality of third ribs, each of which extends toward a region of the hollow portion from a bottom surface of at least one edge portion on a supply-airflow outflow side or a discharge-airflow outflow side of the heat exchanger, the filter frame includes a partition plate that is placed in the filter frame and is parallel to a lateral direction of the filter frame so as to partition the hollow portion into a plurality of divided hollow portions (113a, 113b), and each of the divided hollow portions (113a, 113b) includes the first rib, the second rib, and the third rib. a main body in which a supply air path to supply outside air to indoors and a discharge air path to discharge inside air to outdoors are provided; a heat exchanger placed in the main body 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 and polygonal shaped partition members stacked with spacing therebetween; an air supplying fan placed in the main body to generate the supply airflow; an air discharging fan placed in the main body to generate the discharge airflow; and a filter (5, 6) in which a filter main body is accommodated in a hollow portion of a filter frame that has a rectangular shape in front view, the filter (5, 6) being provided on a supply-airflow inflow side and a discharge-airflow inflow side of the heat exchanger, wherein the filter frame is configured by an integrally-molded single member, the filter frame includes a first rib connecting top surfaces of two longer edge portions (111a, 111c) which face one another on the supply-airflow inflow side or the discharge-airflow inflow side, second ribs, each of which connects two adjacent edge portions that define a corresponding one of at least two corner portions that are adjacent to each other in a direction of elongation of a shorter edge portion (111b, 111d) on the supply-airflow inflow side or the discharge-airflow inflow side, and a plurality of third ribs, each of which extends toward a region of the hollow portion from a bottom surface of at least one edge portion on a supply-airflow outflow side or a discharge-airflow outflow side of the heat exchanger, a first rib connecting top surfaces of two longer edge portions (111a, 111c) which face one another on the supply-airflow inflow side or the discharge-airflow inflow side, second ribs, each of which connects two adjacent edge portions that define a corresponding one of at least two corner portions that are adjacent to each other in a direction of elongation of a shorter edge portion (111b, 111d) on the supply-airflow inflow side or the discharge-airflow inflow side, and a plurality of third ribs, each of which extends toward a region of the hollow portion from a bottom surface of at least one edge portion on a supply-airflow outflow side or a discharge-airflow outflow side of the heat exchanger, the filter frame includes a partition plate that is placed in the filter frame and is parallel to a lateral direction of the filter frame so as to partition the hollow portion into a plurality of divided hollow portions (113a, 113b), and each of the divided hollow portions (113a, 113b) includes the first rib, the second rib, and the third rib.