There is provided a power amplifier circuit that applies an output voltage according to a given input voltage to a load, the power amplifier circuit includes an amplifying section of which an output port is connected to the load and that outputs the output voltage according to the input voltage, a source-side power source path that supplies an electric current output from the amplifying section via the output port to the amplifying section, a sink-side power source path that supplies an electric current drawn from the amplifying section via the output port to the amplifying section, a source-side capacitor that is connected between the output port of the amplifying section and the source-side power source path, and a sink-side capacitor that is connected between the output port of the amplifying section and the sink-side power source path.
