A power amplifier circuit includes: a first power splitter that splits an input signal into a first input signal and a second input signal; an amplifier circuit that includes a pair of amplifiers electrically connected in parallel and that amplifies the first input signal and outputs an output signal to an output terminal; a control amplifier that amplifies the second input signal and outputs, to the amplifier circuit, a control signal for controlling load impedance of the amplifier circuit; and a first impedance matching unit that is electrically connected in series between the amplifier circuit and the control amplifier and includes a transmission line transformer.