A high frequency front end circuit (10) comprises a duplexer (20), a phase adjustment circuit (30) and a power amplifier (PA). The phase adjustment circuit (30) is connected between the power amplifier (PA) and a Tx filter (21) of the duplexer (20). The phase adjustment circuit (30) performs a phase adjustment such that the phase is not in any conjugate relationship between a quadrant in which an impedance ZRX (fr0) seen from the Tx filter (21) toward the power amplifier (PA) for the fundamental frequency of a received signal exists and a quadrant in which an impedance ZTX (fr0) seen from the power amplifier (PA) toward the Tx filter (21) for the fundamental frequency of the received signal exists.
