An input shaft for a hybrid transmission that is used for the hybrid transmission equipped with a plurality of friction elements and at least two or more planetary gear sets receiving power from an engine and at least one or more motor generators, may include a first spline to which at least one of the motor generators may be connected, a second spline and a third spline to which rotary elements of the planetary gear sets may be connected, respectively, and a lubricant channel formed inside the input shaft to provide a channel for lubricant for lubricating parts of the transmission.