a motor having a rotor fixed on an output shaft thereof and a stator;

a control unit for controlling the motor;

a control board; and

a housing covering the inside of the control unit, the housing including an insulating case and a metal housing,

wherein the motor and the control unit are arranged in parallel with each other in a direction in which the output shaft of the motor extends so as to be integrally fixed to each other,

wherein the motor has a first armature winding and a second armature winding,

wherein the control unit has a first control unit for controlling the first armature winding and a second control unit for controlling the second armature winding,

wherein at least part of constituent elements of the first control unit and at least part of constituent elements of the second control unit are arranged in a peripheral portion of the output shaft,

wherein the constituent elements of the first control unit and the constituent elements, of the second control unit, that correspond to the constituent elements of the first control unit are arranged in point symmetry with respect to a center axis of the output shaft or in line symmetry with respect to a virtual straight line perpendicular to the direction in which the output shaft extends, and

wherein pairs of the constituent elements of the first control unit and the constituent elements of the second control unit comprise each of a pair of inverter circuits, a pair of CPUs, and a pair of driving circuits,

wherein the pair of driving circuits and the pair of CPUs are arranged on a face of the control board,

wherein the pair of inverter circuits are arranged on a face of the metal housing, and

wherein the face of the control board and the face of the metal housing face a same direction.