a method of connecting a plastic workpiece to a further workpiece and a device for carrying out the method are shown and described . the object of providing a method with which a positive - locking connection between a plastic workpiece and a further workpiece can be produced in a short time and without considerable outlay in terms of apparatus is achieved by a method comprising the following steps : providing a plastic workpiece and a further workpiece , placing the further workpiece against the plastic workpiece , providing a connecting element on a surface of the plastic workpiece , this surface being opposite the surface against which the further workpiece bears , producing a recess in the further workpiece , this recess being provided on the surface bearing against the plastic workpiece , heating the connecting element , so that the material of the connecting element is plasticized , and pressing plasticized material into the recess .