A method for producing a threaded connection between a drill head provided for earth drilling and a drill pipe element, comprising the following method steps: a) positioning a drill pipe element to be connected to the drill head above the drill head, b) controlled moving of the element to be connected towards a thread connected to the drill head to a position in which a threaded connection between the element to be connected and the drill head can be produced by rotating the drill pipe element and/or the drill head, c) rotating the element to be connected and/or the drill head to produce the threaded connection, wherein d) the drill head is positively connected to a device for holding a drill head provided for earth drilling via a gripping section arranged above a drill structure before producing the threaded connection, characterised in that e) the device comprises a housing having a circular outer contour that is connected to a holding structure for conjoint rotation and the housing is held by a first clamping device of a clamping/screwing device, f) the element to be connected to the drill head is held by a second clamping device of said clamping/screwing device, wherein the first clamping device and the second clamping device are arranged one above the other and wherein the first clamping device and the second clamping device are movable relative to one another such that elements held in the clamping devices (62, 64) can be rotated relative to one another, and g) the drill pipe element to be connected is moved by the clamping/screwing device relative to the device such that the relative rotational movement between the drill head and the drill pipe element required for the desired threaded connection is performed by the clamping/screwing device. a) positioning a drill pipe element to be connected to the drill head above the drill head, b) controlled moving of the element to be connected towards a thread connected to the drill head to a position in which a threaded connection between the element to be connected and the drill head can be produced by rotating the drill pipe element and/or the drill head, c) rotating the element to be connected and/or the drill head to produce the threaded connection, wherein d) the drill head is positively connected to a device for holding a drill head provided for earth drilling via a gripping section arranged above a drill structure before producing the threaded connection, e) the device comprises a housing having a circular outer contour that is connected to a holding structure for conjoint rotation and the housing is held by a first clamping device of a clamping/screwing device, f) the element to be connected to the drill head is held by a second clamping device of said clamping/screwing device, wherein the first clamping device and the second clamping device are arranged one above the other and wherein the first clamping device and the second clamping device are movable relative to one another such that elements held in the clamping devices (62, 64) can be rotated relative to one another, and g) the drill pipe element to be connected is moved by the clamping/screwing device relative to the device such that the relative rotational movement between the drill head and the drill pipe element required for the desired threaded connection is performed by the clamping/screwing device.