A microwave oven is provided which can prolong a lifetime of the oven's
lamp by elimination of heat resistant tape fitted to the lighting window,
and by optimizing cooling of the lamp. A ventilation structure of the
microwave oven includes an air inlet, which also functions as a lighting
window, located in one side of the upper surface of the cooking cavity,
with the lamp mounted proximate thereto. The ventilation structure
includes a ventilation motor and an air duct where the air duct guides
cooling air past the lamp and into the cooking space through the air
inlet.
