An electronic apparatus includes heat generating components accommodated in a sealed housing section of a housing, an internal-side heat exchanger and an external-side heat exchanger on opposing sides of a wall of the housing, an external-side heat exchanger for heat generating components for heat exchange between the heat generating components and air outside the housing section, and an internal fan. A high-heat generating component generating the most heat contacts the inner surface and opposed to the external-side heat exchanger for heat generating components. Heat exchange between the high-heat generating component and air outside the housing section is effected via the external-side heat exchanger for heat generating components. Heat exchange between air inside the housing section and air outside the housing section is effected via the internal-side heat exchanger and the external-side heat exchanger.