In a control system for a four-wheel drive vehicle, when the four-wheel drive vehicle is four-wheel driven full time (that is, at all times), the difference in rotation of each wheel occurring due to the difference in air pressure within each tire, is differentiated from the difference in rotation of each wheel occurring due to cornering or the state of the road surface, and is correspondingly corrected so as to distribute the driving force to the four wheels. Thus, even if the difference in rotation of each wheel occurs due to the air pressure within each tire, the malfunction in which four-wheel driving is controlled based on the erroneous determination that the difference in rotation of each wheel is due to cornering or the state of the road surface can be prevented from occurring.