Elastic-wave filter device having a band-pass filter and a band-reject filter

An elastic-wave filter device having a pass band and a stop band at frequencies higher than the pass band, the elastic-wave filter device comprising:

• an input terminal;
• an output terminal;
• a band-pass filter connected in series between the input terminal and the output terminal;
• and
• a first band-eliminate filter connected in series between the input terminal and the output terminal;
• wherein
• the first band-eliminate filter includes a series arm connected in series between the input terminal and the output terminal, at least one inductor connected in series in the series arm, a plurality of parallel arms connected between the series arm and a ground potential, and a plurality of parallel-arm resonators in the respective plurality of parallel arms;
• the plurality of parallel-arm resonators include a first parallel-arm resonator having a first resonance frequency in the stop band and a second parallel-arm resonator having a second resonance frequency in the stop band, the second resonance frequency being higher than the first resonance frequency;
• and
• an impedance value of the first parallel-arm resonator is larger than an impedance value of the second parallel-arm resonator.