Provided is a rotary electric machine including housings, a stator, a rotor, bearings, a slip ring, a power assembly, a control assembly, a rotation sensor, and a brush holder, in which a switching element mounting surface of the power assembly and a surface of the control assembly, on which a control element of a control circuit is mounted, are placed in parallel to a rotation shaft, and the rotation sensor is placed between the rear bearing and the slip ring.