the invention relates to a thermoforming machine including : a frame ; a first plate and a second plate for receiving form sections , wherein at least one of the plates is adjustable relative to the frame ; drive means for adjusting the plates relative to each other ; and a pulling mechanism for pulling the second plate in the direction of the first plate , wherein the pulling mechanism includes at least one pulling device mounted to one of the plates , the pulling device including a pulling rod , which can be clamped by a friction locked coupling with an associated clamping device , mounted at the other one of the plates , when adjusting the first and second plates relative to each other .