Providing a control apparatus for a vehicular drive system, which is configured to implement a torque reduction control during a shifting action of an automatic transmission, and which permits reduction of the size and cost of an electric circuit including a smoothing capacitor.An electricity-generation-amount-variation restricting region A01 is predetermined such that a point of a vehicle running state lies in the electricity-generation-amount-variation restricting region A01 prior to a moment of determination to perform a shifting action of the automatic transmission, and electricity-generation-amount-variation restricting means 96 implements an electricity-generation-amount-variation restricting control to restrict a rate of increase of a total amount of an electric energy generated by first and second electric motors MG1 and MG2, to a predetermined upper limit value LTGN, when the point of the vehicle running state has moved into the electricity-generation-amount-variation restricting region A01. Accordingly, it is possible to prevent an abrupt increase of the total amount of the electric energy generated by the first and second electric motors MG1 and MG2 prior to a torque reduction control to be implemented during the shifting action of the automatic transmission 22. As a result, the amount of a surplus electric energy can be reduced, so that a required electrostatic capacity of the inverter smoothing capacitor 66 can be reduced. Namely, the size and cost of an electric power source control circuit 60 including the inverter smoothing capacitor 66 can be reduced.