An exhaust gas recirculation distribution variation sensing device for a multi-cylinder internal combustion engine having a plurality of cylinders and a plurality of injectors respectively provided to the cylinders, the internal combustion engine being structured to distribute recirculated exhaust gas, which is recirculated from an exhaust system to an intake system, to the respective cylinders, comprising: a torque sensing means (S31, 42) for sensing instantaneous torque caused with combustion of fuel injected from the injector or a physical quantity relevant to the instantaneous torque for each cylinder; an injection quantity sensing means (S32, 20a, 200a) for sensing an actual injection quantity of the injected fuel or a physical quantity relevant to the injection quantity for each cylinder; an injection controlling means for injecting the same quantity of the fuel sequentially into the respective cylinders such that the injection quantity sensing values of all the cylinders coincide with each other; and an exhaust gas recirculation distribution variation calculating means for calculating an exhaust gas recirculation distribution variation as a distribution variation of the recirculated exhaust gas to the respective cylinders based on a variation in the torque sensing value of the torque sensing means (S31, 42) among the cylinders and a variation in the injection quantity sensing value of the injection quantity sensing means (S32, 20a, 200a) among the cylinders, wherein the torque sensing means (S31, 42) senses instantaneous torque caused with combustion of the fuel injected by the injection controlling means or a physical quantity relevant to the instantaneous torque for each cylinder, and the exhaust gas recirculation distribution variation calculating means calculates the exhaust gas recirculation distribution variation while bringing the variation in the injection quantity sensing value of the injection quantity sensing means (S32, 20a, 200a) among the cylinders to zero. a torque sensing means (S31, 42) for sensing instantaneous torque caused with combustion of fuel injected from the injector or a physical quantity relevant to the instantaneous torque for each cylinder; an injection quantity sensing means (S32, 20a, 200a) for sensing an actual injection quantity of the injected fuel or a physical quantity relevant to the injection quantity for each cylinder; an injection controlling means for injecting the same quantity of the fuel sequentially into the respective cylinders such that the injection quantity sensing values of all the cylinders coincide with each other; and an exhaust gas recirculation distribution variation calculating means for calculating an exhaust gas recirculation distribution variation as a distribution variation of the recirculated exhaust gas to the respective cylinders based on a variation in the torque sensing value of the torque sensing means (S31, 42) among the cylinders and a variation in the injection quantity sensing value of the injection quantity sensing means (S32, 20a, 200a) among the cylinders, wherein the torque sensing means (S31, 42) senses instantaneous torque caused with combustion of the fuel injected by the injection controlling means or a physical quantity relevant to the instantaneous torque for each cylinder, and the exhaust gas recirculation distribution variation calculating means calculates the exhaust gas recirculation distribution variation while bringing the variation in the injection quantity sensing value of the injection quantity sensing means (S32, 20a, 200a) among the cylinders to zero.