The image sensing apparatus includes a first circuit for forming a signal to control the gains of the various color signals included in the outputs of a image sensing device in accordance with the amplitudes of the color-difference signals of the various color signals, a second circuit for forming a signal to control the gains of the various color signals in accordance with the color temperature of an object to be photographed, and a gain control circuit for controlling and determining the gains of the various color signals in response to a combined output of the signals formed by the first and second circuits.