With the lawn dethatcher for ride-on mowers, large lawn areas can be easily and quickly cleared of moss and other weeds, while also being efficiently aerated, allowing the grass to develop a denser growth again. The coupling allows the lawn comb to be easily and securely connected to the ride-on mower or lawn tractor, provided it has a towing device. In cases of particularly dense moss growth, the dethatcher can be further weighted with additional weights, so that the galvanized steel fenders press down harder on the lawn surface and remove even more moss.