Multiplexer, high-frequency front-end circuit, and communication device

A multiplexer comprising:

• a common terminal;
• a first input/output terminal;
• a second input/output terminal;
• a plurality of filters that are connected to each other at the common terminal;
• a first filter that includes at least two elastic wave resonators that are located between the common terminal and the first input/output terminal, the first filter including a first pass band;
• and
• a second filter that is connected between the common terminal and the second input/output terminal, the second filter including a second pass band that is at a different frequency from the first pass band;
• wherein
• the first filter includes:
• an initial-stage filter section that includes at least one first elastic wave resonator located on the common terminal side among the at least two elastic wave resonators, and
• a subsequent-stage filter section that includes a second elastic wave resonator that is different from the at least one first elastic wave resonator;
• and
• a reflection coefficient of the initial-stage filter section in the second pass band when the initial-stage filter section is viewed from the common terminal side as a single component is larger than a reflection coefficient of the subsequent-stage filter section in the second pass band when the subsequent-stage filter section is viewed from the common terminal side as a single component.