A control apparatus for an internal combustion engine, the control apparatus comprising: a throttle valve installed in an intake path of the internal combustion engine; at least one actuator capable of changing a torque of the internal combustion engine by a method other than by changing the opening of the throttle valve, wherein the control apparatus further comprises, as the actuator, at least one of the followings: an ignition device capable of changing ignition timing, a fuel injection device, and a variable valve device capable of changing the valve opening characteristics of an intake valve and/or an exhaust valve, wherein a plurality of required torque output means each of which outputs a required torque on the basis of its own purpose to the internal combustion engine; required torque consolidation means for calculating an after-consolidation required torque, the after-consolidation required torque being determined by consolidating the required torques output from the plurality of required torque output means; sensitivity judgment means for judging whether the sensitivity of opening variation of the throttle valve corresponding to torque variation is high; first torque control means which, when the sensitivity judgment means determine that the sensitivity of opening variation of the throttle valve is not high, causes an actual torque to follow variation of the after-consolidation required torque by changing the opening of the throttle valve in accordance with the variation of the after-consolidation required torque; and second torque control means which, when the sensitivity judgment means determine that the sensitivity of opening variation of the throttle valve is high, fixes the opening of the throttle valve and causes the actual torque to follow variation of the after-consolidation required torque by changing the operation amount of the actuator in accordance with the variation of the after-consolidation required torque, wherein the sensitivity judgment means determines that the sensitivity of opening variation of the throttle valve corresponding to torque variation is high when the after-consolidation required torque is within a highly sensitive throttle opening region predefined in a torque/throttle opening map, or when a ratio (ΔTA/ΔTrq) of a slight change (ΔTA) in the throttle opening and a slight change (ΔTrq) in the after-consolidation required torque is greater than a predetermined threshold value. a throttle valve installed in an intake path of the internal combustion engine; at least one actuator capable of changing a torque of the internal combustion engine by a method other than by changing the opening of the throttle valve, wherein the control apparatus further comprises, as the actuator, at least one of the followings: an ignition device capable of changing ignition timing, a fuel injection device, and a variable valve device capable of changing the valve opening characteristics of an intake valve and/or an exhaust valve, wherein a plurality of required torque output means each of which outputs a required torque on the basis of its own purpose to the internal combustion engine; required torque consolidation means for calculating an after-consolidation required torque, the after-consolidation required torque being determined by consolidating the required torques output from the plurality of required torque output means; sensitivity judgment means for judging whether the sensitivity of opening variation of the throttle valve corresponding to torque variation is high; first torque control means which, when the sensitivity judgment means determine that the sensitivity of opening variation of the throttle valve is not high, causes an actual torque to follow variation of the after-consolidation required torque by changing the opening of the throttle valve in accordance with the variation of the after-consolidation required torque; and second torque control means which, when the sensitivity judgment means determine that the sensitivity of opening variation of the throttle valve is high, fixes the opening of the throttle valve and causes the actual torque to follow variation of the after-consolidation required torque by changing the operation amount of the actuator in accordance with the variation of the after-consolidation required torque, wherein the sensitivity judgment means determines that the sensitivity of opening variation of the throttle valve corresponding to torque variation is high when the after-consolidation required torque is within a highly sensitive throttle opening region predefined in a torque/throttle opening map, or when a ratio (ΔTA/ΔTrq) of a slight change (ΔTA) in the throttle opening and a slight change (ΔTrq) in the after-consolidation required torque is greater than a predetermined threshold value. when the after-consolidation required torque is within a highly sensitive throttle opening region predefined in a torque/throttle opening map, or when a ratio (ΔTA/ΔTrq) of a slight change (ΔTA) in the throttle opening and a slight change (ΔTrq) in the after-consolidation required torque is greater than a predetermined threshold value.