Microwave unit door with viewing window

The door with a viewing window for a microwave unit has a metallic door frame, two glass panes held spaced apart from each other between the metallic door frame and a metallic screen for blocking microwaves arranged between the glass panes. The metallic screen is in electrically conductive contact with the metallic door frame. In order to improve observation of the interior of the microwave unit the metallic screen is a woven fabric of thin metal fibers, which are woven together with a predetermined small spacing. In preferred embodiments the metal fiber is steel fiber. The metal fibers preferably each have a thickness of from 0.02 mm to 0.1 mm and their opposing sides are spaced apart by about 0.12 mm in the woven fabric.