Abstract: A multi-passband filter includes a dielectric member (1), a plurality of resonant lines (12a-12c,13,14a-14d,15a-15c) provided within or on the dielectric member (1) and the resonant lines (12a-12c,13,14a-14d,15a-15c) are coupled to adjacent resonant lines so that a plurality of resonators are provided. At least one pair of resonant lines (12a-12c,13,14a-14d,15a-15c) are interdigitally coupled to each other in such a manner that the open ends and short-circuited ends of said resonant lines (12a-12c,13,14a-14d,15a-15c) are located in opposite directions with respect to each other, thereby providing a band-elimination filter. At least one pair of said resonant lines (14a-14d) may be comb-line coupled to each other in such a manner that the open ends and short-circuited ends of said resonant lines (14a-14d) are located in the same direction with respect to each other, thereby providing a band-pass filter. The multi-passband filter requires only a limited space to dispose the band-elimination filter in the filter.