A control apparatus of a touch panel having a resistive film includes a microcomputer having a controller configured to function as a determination part and a corrector. The determination part determines a number of touch points indicating a number of simultaneous touch positions on the touch panel. The corrector corrects input coordinates indicating a touch position of each of the touch points using coordinate correction that differs depending on whether the touch panel is touched with a one-point touch in which the number of the touch points is one or a two-point touch in which the number of the touch points is two, which have been determined by the determination part.