A vehicle power transmission device includes: a power generation device that includes a rotating machine electrically controllable in torque; and a power distribution device including three rotating elements, which are an input rotating element, a first output rotating element operatively coupled to a first wheel, and a second output rotating element operatively coupled to a second wheel, the power distribution device distributing power input to the input rotating element from the power generation device to the first output rotating element and the second output rotating element, the power distribution device being configured such that the input rotating element, the first output rotating element, and the second output rotating element are arranged in this order from one end to the other end on a collinear diagram capable of representing the rotation speeds of the three rotating elements on a straight line, the operation state of the rotating machine being controlled to put the first output rotating element and the second output rotating element into a predetermined differential sate, and the power generation device including: an electric type differential portion with the rotating machine coupled to a differential mechanism in a power transmittable manner to control a differential state between a rotation speed of a differential input member and a rotation speed of a differential output member by controlling the operation state of the rotating machine; and a power source coupled to the differential input member in a power transmittable manner.