Abstract: A window blind, with a winding shaft having a rolling-up device, a blind web rolled up on the winding shaft, a pull bar, to which the free end of the blind web is fastened, a guide arrangement, on which the end regions of the pull bar are arranged longitudinally displaceably perpendicularly to the pull bar axis, and a braking arrangement which is arranged inside the pull bar and acts releasably on the guide arrangement in order to fix the pull bar in any positions on the guide arrangement.