The present invention relates to a grounding structure of microwav oven. Said structure includes edge portion which is positioned on the back surface of heating chamber assembly body and forwards bent horizontally and grounding portion formed by applying pressure to make the edge portion be recessed downward. The grounding portion and upper end of the rear wall are formed into the horizontal surface, and the grounding portion is connected with rear wall and edge portion. On the grounding portion a fixing combination hole is formed, and said fixing combination hole is equipped with a screw for grounding. Said grounding structure can protect the grounding portion from damage or deformation due to external force. |