To provide a slide construction effectively improving stability of a wheel chair and the like getting on and off a vehicle in a slope apparatus for a vehicle which unfolds by sliding substantially in three or more stages and the slope apparatus for a vehicle using the same.

A slide slope is substantially formed with three stages including a first slope rotatably articulated with the vehicle at its base end, a second slope that slidingly unfolds and contracts with respect to the first slope, and a third slope that slidingly unfolds and folds with respect to the second slope, wherein, assuming the section moduluses of a pair of first slide rails, second slide rails and third slide rails respectively provided on both sides in the width direction of the first slope, the second slope and the third slope as Z1, Z2and Z3, they are in relation of Z2≥Z1, Z2>Z3.

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