An exhaust gas recirculation control method of an internal combustion engine, the internal combustion engine comprising: a turbo supercharger; an exhaust gas recirculation passage communicating an exhaust passage with an intake passage at a part upstream of a compressor of the turbo supercharger; an exhaust gas recirculating amount control valve disposed in the exhaust gas recirculation passage; a differential pressure generating valve disposed upstream of a merging portion of fresh air gas and exhaust gas in the intake passage; and a controller adapted to control an opening of the exhaust gas recirculation amount control valve and an opening of the differential pressure generating valve, wherein in the method: (F') in a case of changing an exhaust gas recirculation ratio, the controller (G') sets an exhaust gas recirculation ratio history in which the rate of change from the current exhaust gas recirculation ratio to a target exhaust gas recirculation ratio is set without a part in which the exhaust gas recirculation ratio sharply changes, (H') sets a target opening which is an opening of one of the exhaust gas recirculation amount control valve and the differential pressure generating valve when the exhaust gas recirculation ratio has changed to the target exhaust gas recirculation ratio and a target value of the opening change rate from the current opening to the target opening, (I') operates one of the exhaust gas recirculation amount control valve and the differential pressure generating valve on the basis of the target value of the opening change rate; and (J') operates the other one of the exhaust gas recirculation amount control valve and the differential pressure generating valve in accordance with the exhaust gas recirculation ratio determined from the exhaust gas recirculation ratio history and the opening of the one of the exhaust gas recirculation amount control valve and the differential pressure generating valve in operation. the internal combustion engine comprising: a turbo supercharger; an exhaust gas recirculation passage communicating an exhaust passage with an intake passage at a part upstream of a compressor of the turbo supercharger; an exhaust gas recirculating amount control valve disposed in the exhaust gas recirculation passage; a differential pressure generating valve disposed upstream of a merging portion of fresh air gas and exhaust gas in the intake passage; and a controller adapted to control an opening of the exhaust gas recirculation amount control valve and an opening of the differential pressure generating valve, a turbo supercharger; an exhaust gas recirculation passage communicating an exhaust passage with an intake passage at a part upstream of a compressor of the turbo supercharger; an exhaust gas recirculating amount control valve disposed in the exhaust gas recirculation passage; a differential pressure generating valve disposed upstream of a merging portion of fresh air gas and exhaust gas in the intake passage; and a controller adapted to control an opening of the exhaust gas recirculation amount control valve and an opening of the differential pressure generating valve, wherein in the method: (F') in a case of changing an exhaust gas recirculation ratio, the controller (G') sets an exhaust gas recirculation ratio history in which the rate of change from the current exhaust gas recirculation ratio to a target exhaust gas recirculation ratio is set without a part in which the exhaust gas recirculation ratio sharply changes, (H') sets a target opening which is an opening of one of the exhaust gas recirculation amount control valve and the differential pressure generating valve when the exhaust gas recirculation ratio has changed to the target exhaust gas recirculation ratio and a target value of the opening change rate from the current opening to the target opening, (I') operates one of the exhaust gas recirculation amount control valve and the differential pressure generating valve on the basis of the target value of the opening change rate; and (J') operates the other one of the exhaust gas recirculation amount control valve and the differential pressure generating valve in accordance with the exhaust gas recirculation ratio determined from the exhaust gas recirculation ratio history and the opening of the one of the exhaust gas recirculation amount control valve and the differential pressure generating valve in operation. (G') sets an exhaust gas recirculation ratio history in which the rate of change from the current exhaust gas recirculation ratio to a target exhaust gas recirculation ratio is set without a part in which the exhaust gas recirculation ratio sharply changes, (H') sets a target opening which is an opening of one of the exhaust gas recirculation amount control valve and the differential pressure generating valve when the exhaust gas recirculation ratio has changed to the target exhaust gas recirculation ratio and a target value of the opening change rate from the current opening to the target opening, (I') operates one of the exhaust gas recirculation amount control valve and the differential pressure generating valve on the basis of the target value of the opening change rate; and (J') operates the other one of the exhaust gas recirculation amount control valve and the differential pressure generating valve in accordance with the exhaust gas recirculation ratio determined from the exhaust gas recirculation ratio history and the opening of the one of the exhaust gas recirculation amount control valve and the differential pressure generating valve in operation.