The slide deck device for a vehicle

This invention provides a slide deck device, for a vehicle, which prevents a slide deck from rattling with respect to a floor surface of a vehicle even if an upward load is applied to the side deck in a state where the slide deck is completely drawn into the vehicle. The slide deck device is provided with a supporting member 30 provided on a floor surface 15 and supporting an undersurface of a slide deck 20, a floor contact-member 52 provided on the floor surface, and a slide deck contact-member 60 provided on the undersurface of the slide deck. When the slide deck is located at the accommodated position, the slide deck contact-member is in contact with the undersurface of the floor contact-member.