VEHICLE UNIT INSTALLATION STRUCTURE

A vehicle unit installation structure has: a power generating unit that is installed at a front portion of a vehicle; a driving unit that is installed at a vehicle rear side of the power generating unit, and that drives front wheels of the vehicle; and a floor tunnel that is formed at a floor that is disposed at a vehicle rear side of the driving unit, a width of a front end portion of the floor tunnel being greater than a width of at least a rear end portion of the driving unit.