An amplifier circuit has a plurality of amplifiers configured to be connected in series, and each of the plurality of amplifiers has an amplifying element configured to non-inverting amplify a signal and a phase adjustment element configured to be connected to an output terminal of the amplifying element and to adjust a phase of the signal, wherein the amplifying element is subjected to negative feedback, and wherein a stability coefficient of a circuit in which the amplifying elements of the number the same as the number of the plurality of amplifiers are connected in series is less than 1.