High-frequency-proof housing, in particular high-frequency-proof filter housing, having the following features: - comprising a housing comprising a housing base and a housing wall rising from the housing base and comprising a housing cover, - the housing cover is positioned on a housing edge formed on the housing wall of the housing to form a complete housing, - the housing and/or the housing cover consist of an electrically conductive material or of a dielectric material coated with an electrically conductive layer, - the housing cover has a plurality of fastening holes, which are aligned with corresponding holes in the housing wall, - the housing cover is fastened or fastenable to the housing by means of a plurality of screw connections, the screw connections comprising fastening screws which penetrate the fastening holes in the housing cover and engage in the holes axially aligned therewith in the housing wall of the housing, - the high-frequency sealed housing is designed in such a way that the housing cover and the housing are galvanically contacted in the mounted state, - between the housing cover and the housing, a plurality of contact portions (K; K G; K D) arranged in a mutually offset manner are formed or provided, - between the contact portions (K; K G; K D), isolation portions (T; T G; T D) are formed or provided, in the regions of which the housing cover and the housing are galvanically isolated, - the contact portions are formed on the housing edge of the housing in the form of mutually offset housing contact portions (K G) which are positioned in succession and comprise housing edge portions protruding towards the housing cover, - the isolation portions are in the form of housing isolation portions (T G) which comprise housing edge portions (15") that are depressed or recessed with respect to the housing cover and arranged between the protruding housing edge portions, - a gap which brings about galvanic isolation is formed between the housing wall and the housing cover in the region of the depressed or recessed housing edge portions (15"), - the screw connections are provided in the contact portions (K; K G; K D) in the regions of which the housing cover is galvanically contacted with the housing, characterised in that - the housing cover is rigidly connected to the housing by means of a single screw connections only in these contact portions (K; K G; K D). - comprising a housing comprising a housing base and a housing wall rising from the housing base and comprising a housing cover, - the housing cover is positioned on a housing edge formed on the housing wall of the housing to form a complete housing, - the housing and/or the housing cover consist of an electrically conductive material or of a dielectric material coated with an electrically conductive layer, - the housing cover has a plurality of fastening holes, which are aligned with corresponding holes in the housing wall, - the housing cover is fastened or fastenable to the housing by means of a plurality of screw connections, the screw connections comprising fastening screws which penetrate the fastening holes in the housing cover and engage in the holes axially aligned therewith in the housing wall of the housing, - the high-frequency sealed housing is designed in such a way that the housing cover and the housing are galvanically contacted in the mounted state, - between the housing cover and the housing, a plurality of contact portions (K; K G; K D) arranged in a mutually offset manner are formed or provided, - between the contact portions (K; K G; K D), isolation portions (T; T G; T D) are formed or provided, in the regions of which the housing cover and the housing are galvanically isolated, - the contact portions are formed on the housing edge of the housing in the form of mutually offset housing contact portions (K G) which are positioned in succession and comprise housing edge portions protruding towards the housing cover, - the isolation portions are in the form of housing isolation portions (T G) which comprise housing edge portions (15") that are depressed or recessed with respect to the housing cover and arranged between the protruding housing edge portions, - a gap which brings about galvanic isolation is formed between the housing wall and the housing cover in the region of the depressed or recessed housing edge portions (15"), - the screw connections are provided in the contact portions (K; K G; K D) in the regions of which the housing cover is galvanically contacted with the housing, characterised in that - the housing cover is rigidly connected to the housing by means of a single screw connections only in these contact portions (K; K G; K D).