Apparatus and method for supplying fuel in internal combustion engine with variable valve lifter

The invention relates to an apparatus and a method for supplying fuel in an internal combustion engine, wherein a control signal for changing a degree of vaporization of the fuel passing the air intake valve (6) in accordance with the opening degree of the air intake valve (6) or a load of the internal combustion engine so that the fuel of liquid state is restrained from existing in the combustion chamber (40) is generated on supplying said fuel, and subsequently a vaporizing speed of the supplied fuel is changed in accordance with the control signal to adjust the degree of vaporization of the fuel.