are illustrated in the accompanying drawings fig6 u02dc 17 in describing the embodiments same parts will be given the same names and reference symbols and repetitive description of which will be omitted fig6 illustrates a diagram showing latches and a latch board in a microwave oven in accordance with a preferred embodiment of the present invention referring to fig6 there are a latch board 201 provided to one side of a frame reference numeral 13 in fig1 and first and second levers l 1 and l 2 rotatably fitted to upper part and lower part of the latch board 201 respectively the first lever l 1 has two arms and the second lever l 2 has three arms there is a door panel 241 at one side of a door having a push bar 244 and a latch 242 fitted thereto the door panel 241 may be fabricated as one unit with the door the latch board 201 has a bar hole 208 and a latch hole 209 when the door is closed the push bar 244 and the first lever l 1 are inserted into the bar hole 208 and the latch hole 209 respectively in this instance the push bar 244 pushes an arm of the first lever l 1 and the latch 242 pushes an arm of the second lever l 2 in the meantime the head part 242 a of the latch 242 has a hook 242 b and the latch hole 209 has a projection 201 a from an inside of an upper edge thereof the hook 242 b is.