Protective device for a vehicle interior including a flexible two-dimensional structure held on a winding shaft and movable between a pulled-out protective position and a rest position wound-up on the winding shaft. The winding shaft is driven by a motor in both directions of rotation, wherein the two-dimensional structure is provided with a dimensionally stable pull-out profile in the end face region that is in front in the pull-out direction, and a drive transmission arrangement is provided which engages the pull-out profile and is in operative connection with the winding shaft. The winding shaft is associated with a blocking device which is, by control device, movable between a release position, releasing the winding shaft for rotational movement, and a securing position, blocking rotational movement of the winding shaft, in response to a displacement condition of the pull-out profile.