High-frequency heating cooker

A high-frequency heating cooker of the invention includes a high-frequency generating device that generates a high-frequency wave to be supplied to a heating chamber, a cooling device that blows air to cool the high-frequency generating device, an air intake opening that takes the air blown from the cooling device disposed on a first side plate of the heating chamber to cool the high-frequency generating device into the heating chamber, an exhaust opening disposed on a second side plate of the heating chamber to discharge the air taken into the heating chamber from the air intake opening out of the heating chamber, an exhaust guide plate disposed between the second side plate and a side plate of a housing, and an excessive temperature rise preventing device disposed on the exhaust guide plate, the exhaust guide plate having an eaves structure above the excessive temperature rise preventing device.