A trunk hood designed to be automatically closed in controlled manner and to cover the trunk in closed position, comprises an inner surface. The hood comprises an inner mat integral with the inner surface, at least one deformable linking means for linking the inner mat to the inner surface mobile between a spaced apart position and a close-up position, and at least one contact switch designed to detect a close-up position of the inner mat relative to the inner surface and to interrupt the movement closing the hood.