A control device for a vehicle drive device whose control target is a vehicle drive device including an internal combustion engine and a rotating electrical machine as drive power sources of wheels, and having a drive power source engagement device, the rotating electrical machine, and a transmission device disposed in this order from an input member side in a power transfer path connecting an input member drive-coupled to the internal combustion engine to an output member drive-coupled to the wheels, wherein the vehicle drive device includes: an engagement pressure flow channel configured to supply oil for engagement control to the drive power source engagement device and a transmission engagement device included in the transmission device; a lubrication flow channel configured to supply oil for lubrication to the drive power source engagement device; a first pump driven by at least one of the internal combustion engine and the rotating electrical machine and having a discharge port connected to the engagement pressure flow channel; a second pump driven by a power source different from the internal combustion engine and the rotating electrical machine; and a flow channel control valve configured to selectively switch flow channels between a first state in which an outflow destination of oil discharged from the second pump is the engagement pressure flow channel and a second state in which an outflow destination of oil discharged from the second pump is the lubrication flow channel, characterized in that the control device is configured such that, when a failure in which the flow channel control valve is fixed in the second state has occurred, fail-safe control (#3) is performed in which a rotational speed of at least one of the internal combustion engine and the rotating electrical machine is increased to supply oil to the engagement pressure flow channel by the first pump, by which the drive power source engagement device and the transmission engagement device are controlled. an engagement pressure flow channel configured to supply oil for engagement control to the drive power source engagement device and a transmission engagement device included in the transmission device; a lubrication flow channel configured to supply oil for lubrication to the drive power source engagement device; a first pump driven by at least one of the internal combustion engine and the rotating electrical machine and having a discharge port connected to the engagement pressure flow channel; a second pump driven by a power source different from the internal combustion engine and the rotating electrical machine; and a flow channel control valve configured to selectively switch flow channels between a first state in which an outflow destination of oil discharged from the second pump is the engagement pressure flow channel and a second state in which an outflow destination of oil discharged from the second pump is the lubrication flow channel, characterized in that the control device is configured such that, when a failure in which the flow channel control valve is fixed in the second state has occurred, fail-safe control (#3) is performed in which a rotational speed of at least one of the internal combustion engine and the rotating electrical machine is increased to supply oil to the engagement pressure flow channel by the first pump, by which the drive power source engagement device and the transmission engagement device are controlled.