An operation control system for a hybrid vehicle capable of causing the vehicle to travel in parallel mode in which front wheels of the vehicle are driven by an engine and a front motor, capable of fuel cut control to stop fuel supply to the engine during deceleration of the vehicle, and capable of regenerative braking using the front motor, wherein when the vehicle traveling in parallel mode is to be decelerated and SOC of a traction battery is lower than or equal to an electricity-generation determination lower limit value Sbu, Sbd, a hybrid control unit performs first charging promotion control to brake the vehicle by regenerative braking while causing the engine to continue operating by continuing fuel supply.