Industrial truck with a trailer hitch

Industrial truck (10) with a drive unit that has a trailer coupling (22) for coupling a trailer, wherein the trailer coupling is rigidly mounted on an adapter (30) and the adapter is mounted on the drive unit such that a pulling force (Z) acting on the trailer coupling (22) and directed away from the drive unit is introduced into the drive unit via a force measuring device (36), wherein the adapter (30) is designed as a plate on whose first flat side the trailer coupling is mounted and on whose opposite flat side a rotary bearing (32) and a connecting element (34) are arranged.