A control apparatus for controlling a steering mechanism, the steering mechanism including an electromagnetic clutch to connect and disconnect a power transmission path between a steering wheel and a steered wheel in response to whether power is supplied to the electromagnetic clutch, a reaction motor to generate a steering reaction, the steering reaction being a torque to be applied to a portion of the power transmission path between the steering wheel and the electromagnetic clutch (12 in a direction opposite to a steering direction, and a steering motor to generate a steering force, the steering force being power to be applied to a portion of the power transmission path between the electromagnetic clutch and the steered wheel so as to steer the steered wheel, the control apparatus comprising: a plurality of control circuits (86, 88, 89) to control supply of power to each of the electromagnetic clutch, the reaction motor, and the steering motor, the plurality of control circuits (86, 88, 89) being configured to calculate a current command value for at least one of the reaction motor and the steering motor in accordance with a quantity of state indicative of a steering state of the steering wheel magnetically detected by a sensor provided for the steering mechanism; characterized by further comprising a memory storing a first correction value (Td) set so as to reduce deviation of the quantity of state relative to a zero point of the quantity of state when the electromagnetic clutch is in an engaged state, and a second correction value (Te) set so as to reduce deviation of the quantity of state relative to the zero point of the quantity of state when the electromagnetic clutch is in a disengaged state, wherein the plurality of control circuits (86, 88, 89) include a correction circuit to correct the quantity of state using the first correction value (Td) when the electromagnetic clutch is in the engaged state, and correct the quantity of state using the second correction value (Te) when the electromagnetic clutch is in the disengaged state. an electromagnetic clutch to connect and disconnect a power transmission path between a steering wheel and a steered wheel in response to whether power is supplied to the electromagnetic clutch, a reaction motor to generate a steering reaction, the steering reaction being a torque to be applied to a portion of the power transmission path between the steering wheel and the electromagnetic clutch (12 in a direction opposite to a steering direction, and a steering motor to generate a steering force, the steering force being power to be applied to a portion of the power transmission path between the electromagnetic clutch and the steered wheel so as to steer the steered wheel, a plurality of control circuits (86, 88, 89) to control supply of power to each of the electromagnetic clutch, the reaction motor, and the steering motor, the plurality of control circuits (86, 88, 89) being configured to calculate a current command value for at least one of the reaction motor and the steering motor in accordance with a quantity of state indicative of a steering state of the steering wheel magnetically detected by a sensor provided for the steering mechanism; characterized by further comprising a memory storing a first correction value (Td) set so as to reduce deviation of the quantity of state relative to a zero point of the quantity of state when the electromagnetic clutch is in an engaged state, and a second correction value (Te) set so as to reduce deviation of the quantity of state relative to the zero point of the quantity of state when the electromagnetic clutch is in a disengaged state, wherein the plurality of control circuits (86, 88, 89) include a correction circuit to correct the quantity of state using the first correction value (Td) when the electromagnetic clutch is in the engaged state, and correct the quantity of state using the second correction value (Te) when the electromagnetic clutch is in the disengaged state.