A vehicle power unit supporting apparatus supports a transversely-mounted power unit having a power source and a speed reduction gear connected to each other. The power unit is supported on a vehicle body by at least a power-source-side mount and a speed-reduction-gear side mount on both of the left and right sides in the vehicle width direction. These mounts are disposed at a position higher than a position of the center of gravity of the power unit. Spring axis lines of the power-source side mount and the speed-reduction-gear side mount are inclined to intersect with each other at a position higher than the position of the center of gravity of the power unit when the vehicle is viewed from the front. An elastic center of the entire power unit supporting apparatus is located at a position lower than the position of the center of gravity of the power unit.