PURPOSE: To improve reliability and safety by preventing generation of a spark at the time of heating with microwave during heat cooking and eliminating an injury of a finger with burr when the interior of a microwave oven is cleaned in the microwave oven for heating to cook a matter to be cooked and a method for manufacturing a net of the oven.

CONSTITUTION: A rotary shaft 6 protrudes to be mounted in a lower part of an oven frame having a microwave oven. A rotary net 10 for lacing a matter to be cooked is detachably provided on the shaft 6, and a burr is removed from the net part 10a of the net 10 to prevent generation of a spark at the time of heating with microwave.