Head plate (10; 20) of an auditory ossicle prosthesis, which replaces or bridges over at least one link or parts of a link of the auditory ossicle chain, in which the head plate (10; 20) is made for mechanically lying on the eardrum and/or the handle of the malleus and may be fitted to one end of the auditory ossicle prosthesis as a first fastening element, whilst at the other end of the prosthesis a second fastening element for mechanically connecting to a link or parts of a link of the auditory ossicle chain or directly to the inner ear as well as a connecting element with at least one shaft-shaped end connecting both fastening elements to each other along a longitudinal axis in a sound-conducting way are provided, in which the head plate (10; 20) has a radially outer ring area (11; 21) surrounding the longitidinal axis, at the inner edge of which a single bridge (12; 22) running along an arched curve is connected firmly to the ring area (11; 21) at two working points (12a, 12b; 22a, 22b) spatially separated from each other, in which next to the bridge (12; 22) two openings (13a, 13b; 23a, 23b) within the ring area (11; 21) separated by the bridge (12; 22) remain open, in which in a middle section of the bridge (12; 22) a through hole (14; 24) for receiving the shaft-shaped end of the connecting element as well as a slot (15; 25) running from one of the openings (13a; 23a) to the through hole (14; 24) for laterally inserting the shaft-shaped end of the connecting element from the opening (13a; 23a) into the through hole (14; 24) is provided, in which the through hole (14; 24) may be narrowed after inserting the shaft-shaped connecting element in order to fix it in the through hole (14; 24), characterised in that the bridge (12; 22) is made as a monolithic lever system and has a first long lever section (12.1; 22.1), which runs from the first working point (12a; 22a) of the bridge (12; 22) in the ring area (11; 21) to one side of a common bending joint (16; 26) arranged in the bridge (12; 22), from the other side of which a second long lever section (12.2; 22.2) runs to the second working point (12b; 22b) of the bridge (12; 22) in the ring area (11; 21), in the bridge (12; 22) a first short lever section (12.1'; 22.1'), which has a smaller length than the first long lever section (12.1; 22.1), as well as a second short lever section (12.2'; 22.2'), which has a smaller length than the second long lever section (12.2; 22.2), are provided, in which the first short lever section (12.1') runs from the connecting point of the first long lever section (12.1; 22.1) with the common bending joint (16; 26) to a first side of the slot (15; 25) and the second short lever section (12.2'; 22.2') runs from the connecting point of the second long lever section (12.2; 22.2) with the common bending joint (16; 26) to a second side of the slot (15; 25), and the first working point (12a; 22a) of the bridge (12; 22) in the ring area (11; 21), the common bending joint (16; 26) and the second working point (12b; 22b) of the bridge (12; 22) in the ring area (11; 21) are arranged non-collinear, so that the first and second short lever section (12.1', 12.2'; 22.1',22.2') are operated by operating the first and second long lever section (12.1, 12.2; 22.1, 22.2) through the common bending joint (16; 26).