The invention provides a communication module with improved isolation characteristics between a plurality of input terminals. The communication module includes a first input terminal to which a firstsignal of a first frequency band is input, a second input terminal to which a second signal of a second frequency band is input, an amplifier that outputs an amplified signal which is obtained by amplifying the first signal, a diplexer that receives the amplified signal and/or the second signal and that outputs an output signal of the first and/or second frequency band, and a harmonic terminationcircuit that short-circuits a harmonic of the second signal. The harmonic termination circuit has an end connected between the second input terminal and the diplexer, and another end grounded at a ground position. A distance in plain view between the first input terminal and the ground position of the harmonic termination circuit is longer than a distance in plain view between the first input terminal and the second input terminal.