Abstract: In an electronic device mounting an electronic circuit module on which electronic components are mounted and having a fan that discharges air from inside the electronic device to an outside of a component when the electronic circuit module operates, the electronic device having an exhaust port provided on a side wall of the component, a duct provided so as to contact the exhaust port on an inside of the component, and a fan portion provided on the duct inside the component. Accordingly, the exhaust from the fan portion passes through the duct and is discharged from the exhaust port, with the airflow generated inside the component able to prevent a rise in temperature inside an electronic circuit module such as a personal computer or television game device due to heat generated from the electronic components mounted on an electronic circuit module.