An ossicular prosthesis has a first fastening element for connection to the tympanic membrane or a component of the ossicular chain, a second fastening element for connection to a further component of the ossicular chain, or directly to the inner ear, an elongated connecting element that connects the two fastening elements in a sound-conducting manner and includes an adjusting device for adjusting the axial length of the prosthesis and including at least two partial strands that extend symmetrically to the longitudinal axis of the connecting element, are extendable and/or compressible in the axial direction, are permanently plastically deformable, and are folded into a plurality of loops transversely to the longitudinal axis before being deformed. As a result, a relatively simple design of the adjusting device considerably reduces the number of different prostheses that must be kept on hand, while ensuring that the prosthesis may be optimally adapted for a specific case.