A power amplifier circuit includes a first transistor that amplifies a first signal and outputs a second signal, a second transistor that amplifies a signal corresponding to the second signal and outputs a third signal, a third transistor that supplies a first bias current or voltage to a base of the first transistor, and a fourth transistor that supplies a second bias current or voltage to a base of the second transistor. A ratio of an emitter area of the third transistor to an emitter area of the first transistor is larger than a ratio of an emitter area of the fourth transistor to an emitter area of the second transistor.