A feedthrough of a medical electronic device, which in particular is implantable, including a housing and at least one electrical or electronic component received in the housing, wherein the feedthrough has a feedthrough flange for closing an opening in the housing and for receiving a multiplicity of connection elements in an insulating body surrounding the connection elements, which connection elements serve for the connection of a component or at least one component, externally of the housing, wherein the insulating body is formed from multi-layer ceramic, in particular from HTCC, with sintered-in pre-configured conductor elements, and comprising a device-specific contact-making means of selected conductor elements, which together with the contacted pre-configured conductor elements forms the connection elements.
