A hybrid vehicle driving apparatus (1-1, 1-2, 1-3, 1-4, 1-5) comprising: a power transmission mechanism which is connected to an engine and is able to output a rotation of the engine while changing its rotation speed; a differential mechanism (20, 40, 80) configured to connect the power transmission mechanism and a drive wheel to each other; and a restriction device configured to switch between a state where a differential operation of the differential mechanism (20, 40, 80) is restricted and a state where the differential operation of the differential mechanism (20, 40, 80) is allowed; and a switching device configured to switch the power transmission mechanism to a connection state where the engine and the differential mechanism (20, 40, 80) are connected to each other and a neutral state where the engine and the differential mechanism (20, 40, 80) are disconnected from each other, wherein the differential mechanism (20, 40, 80) includes a first rotation component (24, 44, 84) which is connected to an output component of the power transmission mechanism, a second rotation component (21, 41, 81) which is connected to a first rotating electric machine, and a third rotation component (23, 43, 83) which is connected to a second rotating electric machine and the drive wheel, and the switching device includes a clutch which is able to connect rotation components of the power transmission mechanism to one another and a brake for restricting the rotation of a rotation component of the power transmission mechanism, and the hybrid vehicle driving apparatus (1-1, 1-2, 1-3, 1-4, 1-5) being characterized in that the differential mechanism (20, 40, 80) consists of one planetary gear mechanism of a single pinion type, wherein the third rotation component (23, 43, 83) is a ring gear, the second rotation component (21, 41, 81) is a sun gear and the first rotation component (24, 44, 84) is a carrier rotatably supporting a pinion gear (22, 42, 82) which is disposed between said ring and sun gears and engages both said ring and sun gears, and a predetermined mode is provided in which the differential operation of the differential mechanism (20, 40, 80) is restricted by the restriction device and the vehicle travels using the first rotating electric machine and the second rotating electric machine as power sources in the neutral state of the power transmission mechanism. a power transmission mechanism which is connected to an engine and is able to output a rotation of the engine while changing its rotation speed; a differential mechanism (20, 40, 80) configured to connect the power transmission mechanism and a drive wheel to each other; and a restriction device configured to switch between a state where a differential operation of the differential mechanism (20, 40, 80) is restricted and a state where the differential operation of the differential mechanism (20, 40, 80) is allowed; and a switching device configured to switch the power transmission mechanism to a connection state where the engine and the differential mechanism (20, 40, 80) are connected to each other and a neutral state where the engine and the differential mechanism (20, 40, 80) are disconnected from each other, wherein the differential mechanism (20, 40, 80) includes a first rotation component (24, 44, 84) which is connected to an output component of the power transmission mechanism, a second rotation component (21, 41, 81) which is connected to a first rotating electric machine, and a third rotation component (23, 43, 83) which is connected to a second rotating electric machine and the drive wheel, and the switching device includes a clutch which is able to connect rotation components of the power transmission mechanism to one another and a brake for restricting the rotation of a rotation component of the power transmission mechanism, and the hybrid vehicle driving apparatus (1-1, 1-2, 1-3, 1-4, 1-5) being characterized in that the differential mechanism (20, 40, 80) consists of one planetary gear mechanism of a single pinion type, wherein the third rotation component (23, 43, 83) is a ring gear, the second rotation component (21, 41, 81) is a sun gear and the first rotation component (24, 44, 84) is a carrier rotatably supporting a pinion gear (22, 42, 82) which is disposed between said ring and sun gears and engages both said ring and sun gears, and a predetermined mode is provided in which the differential operation of the differential mechanism (20, 40, 80) is restricted by the restriction device and the vehicle travels using the first rotating electric machine and the second rotating electric machine as power sources in the neutral state of the power transmission mechanism.