A power transmission device for hybrid vehicle 10, which is provided with an engine 1, a first motor 21 and a second motor 22, includes a flywheel 13 intervening between the crankshaft 11 of the engine 1 and the driven shaft 12 driven by the crankshaft 11, the first clutch 31 disposed at the engine 1 side of the flywheel 13 for disconnecting and connecting power transmission between the engine 1 and the first motor 21, the second clutch 32 disposed at the driven shaft 12 side of the flywheel 13 for disconnecting and connecting power transmission between the engine 1 and the driven shaft 12, and a shifter 73 for disconnecting and connecting power transmission between the second motor 22 and the driven shaft 12.