A power transmission device (16; 122; 142; 162; 182) for a vehicle (10; 120; 140; 160; 180), the power transmission device (16; 122; 142; 162; 182) comprising: a first power transmission path that is provided between an engine and a driving wheel to transmit motive power of the engine to the driving wheel via a gear mechanism, the first power transmission path comprising a forward/backward changeover device and the gear mechanism, the forward/backward changeover device including a first clutch and a first brake (Bl), wherein the first power transmission path is formed through engagement of the first clutch or the first brake; and a second power transmission path that is provided between the engine and the driving wheel to transmit motive power of the engine to the driving wheel via a continuously variable transmission, the second power transmission path provided in parallel with the first power transmission path, the second power transmission path including the continuously variable transmission and a second clutch, the second clutch to selectively connect and disconnect the second power transmission path, characterized in that the power transmission device further comprises a two-way clutch that is provided on the driving wheel side with respect to the first clutch, wherein the two-way clutch is configured to make a changeover between a first mode and a second mode, the first mode ensuring that a first motive power acting in a normal rotation direction is transmitted and that a second motive power acting in a reverse rotation direction is blocked, and the second mode ensuring that at least the second motive power acting in the reverse rotation direction is transmitted from the driving wheel side to the engine side via the two-way clutch. a first power transmission path that is provided between an engine and a driving wheel to transmit motive power of the engine to the driving wheel via a gear mechanism, the first power transmission path comprising a forward/backward changeover device and the gear mechanism, the forward/backward changeover device including a first clutch and a first brake (Bl), wherein the first power transmission path is formed through engagement of the first clutch or the first brake; and a second power transmission path that is provided between the engine and the driving wheel to transmit motive power of the engine to the driving wheel via a continuously variable transmission, the second power transmission path provided in parallel with the first power transmission path, the second power transmission path including the continuously variable transmission and a second clutch, the second clutch to selectively connect and disconnect the second power transmission path, characterized in that the power transmission device further comprises a two-way clutch that is provided on the driving wheel side with respect to the first clutch, wherein the two-way clutch is configured to make a changeover between a first mode and a second mode, the first mode ensuring that a first motive power acting in a normal rotation direction is transmitted and that a second motive power acting in a reverse rotation direction is blocked, and the second mode ensuring that at least the second motive power acting in the reverse rotation direction is transmitted from the driving wheel side to the engine side via the two-way clutch.