An integrated electric power steering apparatus, comprising: a motor; and a control unit which is integrated with the motor, and is configured to control the motor, the control unit comprising: an inverter circuit which comprises a plurality of switching elements (31U, 31V, 31W, 32U, 32V, 32W), and is configured to convert DC power supplied from a power supply into AC power and to supply the converted AC power to the motor by controlling each of the plurality of switching elements (31U, 31V, 31W, 32U, 32V, 32W); a CPU configured to control each of the plurality of switching elements (31U, 31V, 31W, 32U, 32V, 32W); and characterized by further comprising: a single wiring board on which the inverter circuit and the CPU are mounted, the wiring board comprising an inverter-circuit mounted surface on which the inverter circuit is mounted and an inverter-circuit non-mounted surface opposed to the inverter-circuit mounted surface, the wiring board comprising a positive-side wiring pattern configured to connect a positive side of the power supply and a positive side of the inverter circuit to each other and a negative-side wiring pattern configured to connect a negative side of the power supply and a negative side of the inverter circuit to each other, one of the positive-side wiring pattern and the negative-side wiring pattern being formed on a central side of the wiring board and another thereof being formed on an outer periphery side of the wiring board, the plurality of switching elements (31U, 31V, 31W, 32U, 32V, 32W) being mounted between the one wiring pattern and the another wiring pattern. a motor; and a control unit which is integrated with the motor, and is configured to control the motor, the control unit comprising: an inverter circuit which comprises a plurality of switching elements (31U, 31V, 31W, 32U, 32V, 32W), and is configured to convert DC power supplied from a power supply into AC power and to supply the converted AC power to the motor by controlling each of the plurality of switching elements (31U, 31V, 31W, 32U, 32V, 32W); a CPU configured to control each of the plurality of switching elements (31U, 31V, 31W, 32U, 32V, 32W); and characterized by further comprising: a single wiring board on which the inverter circuit and the CPU are mounted, the wiring board comprising an inverter-circuit mounted surface on which the inverter circuit is mounted and an inverter-circuit non-mounted surface opposed to the inverter-circuit mounted surface, the wiring board comprising a positive-side wiring pattern configured to connect a positive side of the power supply and a positive side of the inverter circuit to each other and a negative-side wiring pattern configured to connect a negative side of the power supply and a negative side of the inverter circuit to each other, one of the positive-side wiring pattern and the negative-side wiring pattern being formed on a central side of the wiring board and another thereof being formed on an outer periphery side of the wiring board, the plurality of switching elements (31U, 31V, 31W, 32U, 32V, 32W) being mounted between the one wiring pattern and the another wiring pattern. an inverter circuit which comprises a plurality of switching elements (31U, 31V, 31W, 32U, 32V, 32W), and is configured to convert DC power supplied from a power supply into AC power and to supply the converted AC power to the motor by controlling each of the plurality of switching elements (31U, 31V, 31W, 32U, 32V, 32W); a CPU configured to control each of the plurality of switching elements (31U, 31V, 31W, 32U, 32V, 32W); and characterized by further comprising: a single wiring board on which the inverter circuit and the CPU are mounted, the wiring board comprising an inverter-circuit mounted surface on which the inverter circuit is mounted and an inverter-circuit non-mounted surface opposed to the inverter-circuit mounted surface, the wiring board comprising a positive-side wiring pattern configured to connect a positive side of the power supply and a positive side of the inverter circuit to each other and a negative-side wiring pattern configured to connect a negative side of the power supply and a negative side of the inverter circuit to each other, one of the positive-side wiring pattern and the negative-side wiring pattern being formed on a central side of the wiring board and another thereof being formed on an outer periphery side of the wiring board, the plurality of switching elements (31U, 31V, 31W, 32U, 32V, 32W) being mounted between the one wiring pattern and the another wiring pattern.