A control system of an electrically driven vehicle for controlling a transition from an EV mode to an HEV mode, the control system comprising: - a motor/generator arranged in a driving system of a drive wheel for driving the drive wheel by powering and to carry out electric power generation by regeneration, - a drive transmission engagement element arranged between the motor/generator and the drive wheel, - a detecting section (10 - 17, 23) that is configured to detect a driving state, which includes at least an accelerator opening degree, and a running state, which includes at least a vehicle speed, and - a clutch torque control section that is configured to carry out the torque control as follows: based on a detection by the detecting section (10 - 17, 23), the clutch torque control section is configured to carry out an engagement element slip process so that the drive transmission engagement element is made to slip, and, when the engagement element slip process is carried out, the target motor/generator torque, which is increased from the drive torque of the motor/generator by a clutch slip accelerating torque portion for accelerating slipping of the driving transmission engagement element, is output from the motor/generator, and a drive wheel slip condition determining section that is configured to determine whether a condition of a possibility of the drive wheel slipping on a road surface is met when it is determined that a condition is satisfied that the drive wheel could slip with respect to the road surface on a low μ road; wherein the clutch torque control section is configured to work as follows: when a determination is made that the condition is met in the drive wheel slip condition determining section, the engagement element slip process is carried out; here, as compared with the case when a determination is made by the drive wheel slip condition determining section that the condition is not met, the target motor/generator torque from the motor/generator is smaller when the condition is met in the drive wheel slip condition determining section than when the condition is not met. - a motor/generator arranged in a driving system of a drive wheel for driving the drive wheel by powering and to carry out electric power generation by regeneration, - a drive transmission engagement element arranged between the motor/generator and the drive wheel, - a detecting section (10 - 17, 23) that is configured to detect a driving state, which includes at least an accelerator opening degree, and a running state, which includes at least a vehicle speed, and - a clutch torque control section that is configured to carry out the torque control as follows: based on a detection by the detecting section (10 - 17, 23), the clutch torque control section is configured to carry out an engagement element slip process so that the drive transmission engagement element is made to slip, and, when the engagement element slip process is carried out, the target motor/generator torque, which is increased from the drive torque of the motor/generator by a clutch slip accelerating torque portion for accelerating slipping of the driving transmission engagement element, is output from the motor/generator, and a drive wheel slip condition determining section that is configured to determine whether a condition of a possibility of the drive wheel slipping on a road surface is met when it is determined that a condition is satisfied that the drive wheel could slip with respect to the road surface on a low μ road;