In an electronic control unit, a basic injection quantity calculation part calculates a basic injection quantity value as a target of fuel value, which an injector injects, by using an actual accelerator operation angle value, an actual engine rotation speed value and at least one of an actual vehicle speed value and an actual acceleration value. When the actual vehicle speed value or the acceleration value deviates largely from the estimated value, a correction value calculation part calculates an injection quantity correction value for the basic injection quantity value and a final injection quantity calculation part calculates a final injection quantity value by correcting the basic injection quantity value with the correction value. A driving control part controls driving of the injector so that the injector injects fuel of the final injection quantity value determined by correcting the basic injection quantity value with the correction value.