Transmission for hybrid vehicle

A transmission for a hybrid vehicle, the transmission comprising:

• a main clutch and a sub-clutch disposed on a first input shaft and a second input shaft, respectively, and configured to selectively transfer power from an engine to an output shaft through coupling and decoupling operations;
• an engine-side shift unit comprising:
• at least one first pair of engine-side gears meshed with the sub-clutch and the output shaft;
• and
• at least one second pair of engine-side gears meshed with the second input shaft and the output shaft, wherein a gear ratio of the at least one first pair of the engine-side gears is different from a gear ratio of the at least one second pair of the engine-side gears, such that a pair of gears appropriate to a speed of a vehicle is selected by an engine-side engaging/disengaging unit;
• a third input shaft configured to rotate using power received from a motor;
• a motor-side shift unit comprising a plurality of pairs of motor-side gears having different gear ratios meshed with the third input shaft and the output shaft, such that a pair of gears appropriate to the speed of the vehicle is selected by a motor-side engaging/disengaging unit;
• and
• a one-way clutch disposed on a path along which power is transferred from the motor to the output shaft, such that the power is only transferred from the third input shaft in a direction to the output shaft.