Patent attributes
A tonneau cover unit includes: a tonneau cover that covers a luggage floor which is formed on the rear side within a vehicle; a board that is fitted to an end portion of the tonneau cover, and that is provided with an engaging portion; and a rail along which the engaging portion slides in the longitudinal direction of the vehicle. The rail has a first engaged portion that locks the board at the prescribed position with the board kept substantially parallel to the luggage floor when the engaging portion is engaged in the first engaged portion; and a second engaged portion that locks the board at a prescribed position with the board kept substantially upright at a predetermined angle with respect to the luggage floor when the engaging portion is engaged in the second engaged portion.