Abstract: A method for controlling a heater of a carburetor and an apparatus therefor. The method includes the steps of: setting a heater pre-heating temperature condition so as for the fuel to be vaporized at the optimum state; setting a heater temperature variation rate properly in accordance with the variation of the intra-room temperature; setting a heater temperature variation rate in relation with the latent heat of the material of the heater; controlling the phase angle of an ac power in accordance with the instructions of a microcomputer; and driving the heater with the variable ac power. Thus a proper vaporizing atmosphere is formed in relation with the variations of the surrounding conditions, thereby contributing to the full combustion of the fuel.