POWER TRANSMISSION SYSTEM OF HYBRID ELECTRIC VEHICLE

A power transmission apparatus for a hybrid vehicle of which a second motor shaft gear of a second motor-generator is disposed on one side of a second motor shaft disposed in parallel with the first motor shaft, includes a planetary gear set disposed on the first motor shaft and including one rotation element and the other rotation element are fixedly connected to the engine output shaft and the first motor shaft, respectively, and one remaining rotation element is engaged to the other rotation element, and the planetary gear set in which a drive gear is connected to the remaining rotation element through a one-way clutch, and an output shaft disposed in parallel between the engine output shaft and the second motor shaft, externally gear-engaged with each of the drive gear and the second motor shaft gear through a driven gear fixedly connected to one side.