Abstract: The invention relates to a plastic holding device 1 comprising an outer shell 2 of harder material to be fastened on a support 4, and an inner shell 3 of softer material set therein. The holding element 1 is provided with at least one holding or bearing point, 10 to 13, for the reception of a tubular part, 6 to 9. According to the invention, the outer shell 2 has an open zone 15 adjacent to the support 4 and into which is received the softer inner shell 2 provided with the bearing points 10 to 13. The inner shell projects beyond the outer shell in the unmounted condition and engages the support 4 when the device is mounted to provide noise and vibration dampening for the assembly.