Patent ID: 7641256

Claim:
A tonneau cover device, comprising: a tonneau cover provided behind a seat back of a vehicle, the tonneau cover being configured to cover over a baggage compartment formed before a rear opening that is opened and closed by a back door that is operated vertically; and a pair of guide rails provided at both-side rear pillars of the vehicle that is located before the rear opening, the guide rails being configured to support both-side rear ends of the tonneau cover movably in substantially an obliquely direction along the rear pillars, wherein a front end portion of said tonneau cover is pivotally supported at the vehicle, the tonneau cover comprises a plurality of board members that are provided in a longitudinal direction of the vehicle and jointly connected to each other, a rear board member of the tonneau cover is supported by said guide rails so as to move substantially vertically along the guide rails, and a change of a longitudinal distance between a support point of said rear board member at the guide rail and a pivot axis portion of said front end of the tonneau cover at the vehicle when said rear board member moves upward along the guide rails is configured to be absorbed by said joint connection of the board members.