Abstract: Theft preventing means at a parking lot comprising a hindrance means (10, 30) raisable from a retired position and lockable in a raised position. The hindrance means comprises a tubular part (10) depressed into the ground at the parking lot, and a post (30) telescopically mounted therein. The post (30) has a slot (40) in which a catch (41) is pivotally mounted between an inner position, in which the catch is accommodated within the cross section of the post and an outer position in which the post is prevented from being pushed down in part (10), on the post. An opening (44) is arranged in the catch (41) for receiving the clamp of a padlock.