The present invention relates to a frequency band for adjusting the notch filter having a plurality of grooves filled with ferrite in a rectangular waveguide relates to microwave and millimeter-wave waveguide filter of the radio wave propagation art.; Frequency adjusting notch filter comprising a rectangular waveguide to the electromagnetic wave to pass through according to the present invention may be arranged on one side of a rectangular waveguide is formed inside in the direction of the electromagnetic wave proceeding plurality of rectangular grooves filled with ferrite and; And a plurality of rectangular grooves formed on the inside of the rectangular waveguide provided with a sperm janginga means for applying a field of sperm in the traveling direction normal to the direction of the electromagnetic wave, and is removed the band according to the intensity the sperm sheets to be applied to the plurality of rectangular grooves characterized in that changing.
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