A transaxle device which is interposed between an internal combustion engine, a first rotary electric machine that generates electric power with a driving force of the internal combustion engine, and a drive shaft of a drive wheel, wherein the transaxle device includes a transmission configured to change a rotating ratio of a rotary shaft of the internal combustion engine to the drive shaft, the transaxle device comprising: a first gear interposed on the rotary shaft of the internal combustion engine; a second gear interposed on a rotary shaft of the first rotary electric machine; and a third gear interposed on a rotary shaft on a primary side of the transmission, wherein an intermediate gear is interposed such that the intermediate gear meshes with the first gear and the second gear, receives the driving force of the internal combustion engine from the first gear and rotates to transmit the driving force of the internal combustion engine to the second gear, and as the third gear meshes with the intermediate gear, the driving force of the internal combustion engine is transmitted to the transmission via the intermediate gear, wherein the transaxle device is conf igured to be mounted on a hybrid vehicle including the internal combustion engine, the first rotary electric machine, and a second rotary electric machine that transmits a driving force to the drive shaft, the transaxle device further comprising: a final gear interposed on the drive shaft; and a connection and disconnection mechanism interposed between the second rotary electric machine and the final gear and configured to connect or disconnect transmission of a driving force of the second rotary electric machine, wherein the connection and disconnection mechanism overlaps with the transmission in a plan view. a first gear interposed on the rotary shaft of the internal combustion engine; a second gear interposed on a rotary shaft of the first rotary electric machine; and a third gear interposed on a rotary shaft on a primary side of the transmission, wherein an intermediate gear is interposed such that the intermediate gear meshes with the first gear and the second gear, receives the driving force of the internal combustion engine from the first gear and rotates to transmit the driving force of the internal combustion engine to the second gear, and as the third gear meshes with the intermediate gear, the driving force of the internal combustion engine is transmitted to the transmission via the intermediate gear, wherein the transaxle device is conf igured to be mounted on a hybrid vehicle including the internal combustion engine, the first rotary electric machine, and a second rotary electric machine that transmits a driving force to the drive shaft, the transaxle device further comprising: a final gear interposed on the drive shaft; and a connection and disconnection mechanism interposed between the second rotary electric machine and the final gear and configured to connect or disconnect transmission of a driving force of the second rotary electric machine, wherein the connection and disconnection mechanism overlaps with the transmission in a plan view. a final gear interposed on the drive shaft; and a connection and disconnection mechanism interposed between the second rotary electric machine and the final gear and configured to connect or disconnect transmission of a driving force of the second rotary electric machine, wherein the connection and disconnection mechanism overlaps with the transmission in a plan view.