Abstract: An injector correcting apparatus of a hybrid electric vehicle may include an engine generating power by combustion of a fuel, a motor supporting power of the engine and selectively operating as a generator, a clutch provided between the engine and the motor, an injector injecting the fuel to a combustion chamber of the engine, a driving information detector detecting driving information of a vehicle including driving distance of the vehicle, vehicle speed, coolant temperature, fuel temperature, and state of charge (SOC) of a battery, and a controller correcting fuel injection by increasing a fuel amount supplied to the combustion chamber step-by-step when a correcting condition of the injector derived from the driving information detected by the driving information detector is satisfied, while the vehicle is coasting.