This invention relates to a vehicle engine control unit suitable for use in an automobile. When driving state switching means (202) outputs a constant speed driving designation signal, target torque calculation means (205) calculates a target output torque of an engine (13) of a vehicle in accordance with a target vehicle speed and when driving state switching means (202) outputs an acceleration driving designation signal, the target torque calculation means (205) calculates a target output torque of the engine (13) in accordance with a target acceleration, while engine output torque detection means (208) calculates and outputs, as an actually measured value of the output of the engine (13), an output torque of a torque convertor (207) on the basis of the characteristics of the convertor (207) and on the basis of the engine revolution detection signal detected by engine revolution detection means (206). Controlled variable setting means (210) sets the controlled variable of engine output regulation means (209) so that the engine output torque detected by the engine output torque detectionmeans (208) is equal to the target torque. Accordingly, the engine output regulation means (209) regulates the output of the engine (13) according to the control of the engine output control means (211) on the basis of this controlled variable. Since the target output torque of the engine (13) is set and the engine (13) is controlled so as to bring the actual torque close to this target output torque, suitable control can be accomplished.