A sealing and strain relief device having at least one sealing element is disclosed. The device is arranged in the manner of a sandwich between outer, plate-like bearing elements made from a relatively hard or rigid material and which is made from a relatively soft or elastic material. Slots are introduced both into the outer bearing elements and into the or each central sealing element in such a way that the slots run respectively next to one another and respectively one behind the other, in relation to the sandwich-like arrangement thereof, within the respective bearing element and within the respective sealing element. The strain relief elements are associated with at least one plate-like bearing element such that each data cable, which is sealed and is guided in the region of slots arranged one behind the other of the sandwich-like arrangement, can be restrained using a strain relief element.