POWER TRANSMISSION DEVICE

A motive power transmission device capable of suppressing deformation of matching surfaces of cases is provided. A motive power transmission device (1) is used as a transmission for a hybrid vehicle containing a first rotating electric machine (100) and a second rotating electric machine (200) as two rotating electric machines. The first rotating electric machine (100) and the second rotating electric machine (200) each serving as a motor/generator are housed in independent first case (160) and second case (260), and the both are coupled to constitute the transmission for a hybrid vehicle. A first stator (130) and a second stator (230) are fastened and fixed to the first case (160) and the second case (260) on sides opposite to a first matching surface (169) and a second matching surface (269).