the catalyst warming control apparatus of the present invention is provided for a hybrid vehicle having an internal combustion engine , a generator for generating electric power from the output from the internal combustion engine , a power storage unit for storing electric power generated by the generator , and an electric motor driven by the electric power stored in the power storage unit , the hybrid vehicle being driven by at least one of the outputs from the internal combustion engine and the motor . the catalyst warming control apparatus includes a temperature detector for detecting the temperature of a catalyst or a value relating to the same ; a first comparison circuit for comparing the detected result from the temperature detector with a preset reference value ; and a control circuit for allowing the generator to generate electric power and to store the power in the power storage unit when the internal combustion engine is driven , and when the detected result by the temperature detector is equal to or below the reference value according to the output from the comparison circuit .