Blind for motor vehicle, with non rectangular screen and slidable decoration, and corresponding motor vehicle

The blind has a pulling bar with sliding unit to compensate variation of gap between two rails. The sliding unit has a hubcap (26) fixed with respect to the sliding unit, where the hubcap cooperates with a principal hubcap (27) on the pulling bar. The hubcap (26) cooperates to recover a passage slit of an occultation screen when the screen is in folded position. The hubcap (26) extends above the bar in deployed position. An independent claim is also included for a motor vehicle.