A control apparatus for an internal combustion engine, the internal combustion engine including: a turbocharger including a compressor and a turbine; an intake bypass passage that connects an upstream side and a downstream side of the compressor in an intake passage of the internal combustion engine while bypassing the compressor; an air bypass valve that opens and closes the intake bypass passage; an exhaust bypass passage that connects an upstream side and a downstream side of the turbine in an exhaust passage of the internal combustion engine while bypassing the turbine; a wastegate valve that opens and closes the exhaust bypass passage; a low pressure EGR apparatus that partially recirculates exhaust gas from the exhaust passage downstream of the turbine to the intake passage upstream of the compressor, and the low pressure EGR apparatus including an EGR valve; a throttle valve disposed in the intake passage; an ISC passage that connects an upstream side and a downstream side of the throttle valve in the intake passage; and an ISC valve that opens and closes the ISC passage, the control apparatus characterized by comprising: an electronic control unit: (i) controlling the ISC valve to a predetermined opening, and adjusting an amount of air flowing through the ISC passage by the ISC valve; (ii) executing valve opening control to set an opening of the ISC valve at an opening larger than or equal to a reference opening when a torque required by the internal combustion engine is smaller than an estimated torque that can be generated by the internal combustion engine; and (iii) closing the air bypass valve and the wastegate valve for a fixed period when the EGR valve of the low pressure EGR apparatus is opened during execution of the valve opening control, the fixed period being a period following completion of the valve opening control. a turbocharger including a compressor and a turbine; an intake bypass passage that connects an upstream side and a downstream side of the compressor in an intake passage of the internal combustion engine while bypassing the compressor; an air bypass valve that opens and closes the intake bypass passage; an exhaust bypass passage that connects an upstream side and a downstream side of the turbine in an exhaust passage of the internal combustion engine while bypassing the turbine; a wastegate valve that opens and closes the exhaust bypass passage; a low pressure EGR apparatus that partially recirculates exhaust gas from the exhaust passage downstream of the turbine to the intake passage upstream of the compressor, and the low pressure EGR apparatus including an EGR valve; a throttle valve disposed in the intake passage; an ISC passage that connects an upstream side and a downstream side of the throttle valve in the intake passage; and an ISC valve that opens and closes the ISC passage, the control apparatus characterized by comprising: an electronic control unit: (i) controlling the ISC valve to a predetermined opening, and adjusting an amount of air flowing through the ISC passage by the ISC valve; (ii) executing valve opening control to set an opening of the ISC valve at an opening larger than or equal to a reference opening when a torque required by the internal combustion engine is smaller than an estimated torque that can be generated by the internal combustion engine; and (iii) closing the air bypass valve and the wastegate valve for a fixed period when the EGR valve of the low pressure EGR apparatus is opened during execution of the valve opening control, the fixed period being a period following completion of the valve opening control. (i) controlling the ISC valve to a predetermined opening, and adjusting an amount of air flowing through the ISC passage by the ISC valve; (ii) executing valve opening control to set an opening of the ISC valve at an opening larger than or equal to a reference opening when a torque required by the internal combustion engine is smaller than an estimated torque that can be generated by the internal combustion engine; and (iii) closing the air bypass valve and the wastegate valve for a fixed period when the EGR valve of the low pressure EGR apparatus is opened during execution of the valve opening control, the fixed period being a period following completion of the valve opening control.