A flow rate adjustment method for a variable geometry turbocharger comprising the steps of: driving an actuator of the turbocharger by an adjustment apparatus to an abutment position where a power transmission member (42, 43, 53) for transmitting drive force from the actuator to a variable nozzle abuts a stopper, acquiring and storing an abutment position opening amount by the adjustment apparatus based on a detection signal from an opening detection sensor for detecting an opening of the variable nozzle when the power transmission member (42, 43, 53) is at the abutment position, wherein the variable nozzle is provided for adjusting an opening of an exhaust gas flow path to an exhaust turbine of the turbocharger, driving the actuator by the adjustment apparatus until a detection amount based on the detection signal from the opening detection sensor attains a pre-set temporary control position opening amount, moving the power transmission member (42, 43, 53) to a temporary control position, acquiring and storing a temporary control position flow rate by the adjustment apparatus, where the temporary control position flow rate is a flow rate of an adjustment gas when the power transmission member (42, 43, 53) is at the temporary control position, by using an adjustment gas inflow apparatus for causing the adjustment gas to flow into the exhaust turbine, and a flow rate measurement sensor for measuring the flow rate of the adjustment gas, and obtaining a correction opening amount by the adjustment apparatus based on a difference between the temporary control position flow rate and a real control position flow rate, wherein the real control flow rate is a proper flow rate corresponding to the pre-set temporary control position opening amount, characterized by further comprising the steps of: mounting a recording medium to the variable geometry turbocharger, wherein recorded on the recording medium is the correction opening amount as intrinsic correction information intrinsic to the variable geometry turbocharger, storing the intrinsic correction information recorded on the recording medium in a control apparatus for controlling the actuator such that a detection amount based on a detection signal from the opening detection sensor becomes equal to a detection amount corresponding to a target opening, connecting the control apparatus to the actuator and the opening detection sensor, and correcting the opening of the variable nozzle by the control apparatus based on the intrinsic correction information. driving an actuator of the turbocharger by an adjustment apparatus to an abutment position where a power transmission member (42, 43, 53) for transmitting drive force from the actuator to a variable nozzle abuts a stopper, acquiring and storing an abutment position opening amount by the adjustment apparatus based on a detection signal from an opening detection sensor for detecting an opening of the variable nozzle when the power transmission member (42, 43, 53) is at the abutment position, wherein the variable nozzle is provided for adjusting an opening of an exhaust gas flow path to an exhaust turbine of the turbocharger, driving the actuator by the adjustment apparatus until a detection amount based on the detection signal from the opening detection sensor attains a pre-set temporary control position opening amount, moving the power transmission member (42, 43, 53) to a temporary control position, acquiring and storing a temporary control position flow rate by the adjustment apparatus, where the temporary control position flow rate is a flow rate of an adjustment gas when the power transmission member (42, 43, 53) is at the temporary control position, by using an adjustment gas inflow apparatus for causing the adjustment gas to flow into the exhaust turbine, and a flow rate measurement sensor for measuring the flow rate of the adjustment gas, and obtaining a correction opening amount by the adjustment apparatus based on a difference between the temporary control position flow rate and a real control position flow rate, wherein the real control flow rate is a proper flow rate corresponding to the pre-set temporary control position opening amount, characterized by further comprising the steps of: mounting a recording medium to the variable geometry turbocharger, wherein recorded on the recording medium is the correction opening amount as intrinsic correction information intrinsic to the variable geometry turbocharger, storing the intrinsic correction information recorded on the recording medium in a control apparatus for controlling the actuator such that a detection amount based on a detection signal from the opening detection sensor becomes equal to a detection amount corresponding to a target opening, connecting the control apparatus to the actuator and the opening detection sensor, and correcting the opening of the variable nozzle by the control apparatus based on the intrinsic correction information. mounting a recording medium to the variable geometry turbocharger, wherein recorded on the recording medium is the correction opening amount as intrinsic correction information intrinsic to the variable geometry turbocharger, storing the intrinsic correction information recorded on the recording medium in a control apparatus for controlling the actuator such that a detection amount based on a detection signal from the opening detection sensor becomes equal to a detection amount corresponding to a target opening, connecting the control apparatus to the actuator and the opening detection sensor, and correcting the opening of the variable nozzle by the control apparatus based on the intrinsic correction information.