Roll-away protection for shopping trolleys

The present invention relates to a wheel-locking device for shopping carts, which can be used in a simple manner (in particular blindly, without looking carefully). The wheel-locking device 1; 1 a; 1 b for shopping carts is mountable on the ground, in particular on the road surface of a parking lot, wherein the wheel-locking device 1; 1 a; 1 b is round, in particular circular, has a curved, raised edge 3 and has a depression b in the middle, which can be approached from all sides 360° by a wheel of a shopping cart and is designed to ensure locking of one of the wheels of the shopping cart. The accessibility from all sides has the advantage that the shopping cart can be pushed onto the wheel-locking device from all sides and can also be pushed off the wheel-locking device in all directions.