A drive force control system for improving operational easiness of an accelerator. The control system is configured to: set a slope of a target acceleration such that the target acceleration is increased with a reduction in a vehicle speed; detect an operating period of the accelerator between turning points at which an operating speed of the accelerator is changed from a low speed to a high speed; set the slope of the target acceleration in accordance with the detected operating period; and set the slope of the target acceleration of a case in which the operating period of the accelerator is longer than a predetermined operating period steeper than the slope of the target acceleration set in accordance with the predetermined operating period.