(Amended) A control apparatus for an internal combustion engine having a plurality of cylinders, said control apparatus comprising: a cylinder pressure detecting device configured to detect cylinder pressure of one cylinder out of the plurality of cylinders; a crank angular velocity detecting device configured to detect crank angular velocity of the internal combustion engine; a vibration intensity detecting device configured to detect vibration intensity of predetermined rotation order of the crank angular velocity; a first combustion controlling device configured to change a combustion parameter of the one cylinder on the basis of the cylinder pressure of the one cylinder; and a second combustion controlling device configured to change the combustion parameter of another cylinder out of the plurality of cylinders on the basis of the vibration intensity of the predetermined rotation order, after the change in the combustion parameter of the one cylinder, wherein the predetermined rotation order includes half-order torsional vibration of the internal combustion engine, said second combustion controlling device has a second cylinder controlling device to change the combustion parameter of a second cylinder having a stroke shifted by 360 degrees from that of the one cylinder, so as to minimize the half-order torsional vibration of the internal combustion engine, the plurality of cylinders include a third cylinder and a fourth cylinder having strokes shifted by different angles from that of the another cylinder, in addition to the second cylinder, and said combustion controlling device has: (i) a third cylinder controlling device configured to change the combustion parameter of the third cylinder to minimize the half-order torsional vibration of the internal combustion engine, after the change in the combustion parameter of the second cylinder; and (ii) a fourth cylinder controlling device configured to change the combustion parameters of the third cylinder and the fourth cylinder to minimize first-order torsional vibration of the internal combustion engine, after the change in the combustion parameter of the third cylinder. a cylinder pressure detecting device configured to detect cylinder pressure of one cylinder out of the plurality of cylinders; a crank angular velocity detecting device configured to detect crank angular velocity of the internal combustion engine; a vibration intensity detecting device configured to detect vibration intensity of predetermined rotation order of the crank angular velocity; a first combustion controlling device configured to change a combustion parameter of the one cylinder on the basis of the cylinder pressure of the one cylinder; and a second combustion controlling device configured to change the combustion parameter of another cylinder out of the plurality of cylinders on the basis of the vibration intensity of the predetermined rotation order, after the change in the combustion parameter of the one cylinder, wherein the predetermined rotation order includes half-order torsional vibration of the internal combustion engine, said second combustion controlling device has a second cylinder controlling device to change the combustion parameter of a second cylinder having a stroke shifted by 360 degrees from that of the one cylinder, so as to minimize the half-order torsional vibration of the internal combustion engine, the plurality of cylinders include a third cylinder and a fourth cylinder having strokes shifted by different angles from that of the another cylinder, in addition to the second cylinder, and said combustion controlling device has: (i) a third cylinder controlling device configured to change the combustion parameter of the third cylinder to minimize the half-order torsional vibration of the internal combustion engine, after the change in the combustion parameter of the second cylinder; and (ii) a fourth cylinder controlling device configured to change the combustion parameters of the third cylinder and the fourth cylinder to minimize first-order torsional vibration of the internal combustion engine, after the change in the combustion parameter of the third cylinder.