A screw head holder for a hand-held screwdriving tool with - a shaft, having at one end a connecting section for connection to an output of the screwdriving tool and at the other end a driving section for driving a screw head, and - a holding device, mounted on the shaft and having at least one holding element, - wherein the holding device is configured such that the at least one holding element is, depending on an axial relative movement between the shaft and the holding device, radially movable relative to the driving section between a holding position, in which the screw head is axially held between the driving section and the holding element, and an opening position, in which the holding element axially releases the screw head, - wherein at least one locking element is provided which is, depending on an axial relative movement between the holding device and the shaft, movable into a first locking position locked on the shaft, in which position the holding device is connected to the shaft in detachable and axially fixed manner by means of the locking element and thus assumes an axially secure working position, - wherein in the working position the at least one holding element assumes the holding position, - and wherein the holding device has an inner sleeve mounted on the shaft and an outer sleeve mounted on the inner sleeve, wherein the at least one locking element is radially arranged between the inner sleeve and the outer sleeve and/or the shaft and the outer sleeve, - characterized in that in a release position the inner sleeve and the outer sleeve are connected to one another in detachable and axially fixed manner by means of the locking element, wherein the inner sleeve is axially released relative to the shaft. - a shaft, having at one end a connecting section for connection to an output of the screwdriving tool and at the other end a driving section for driving a screw head, and - a holding device, mounted on the shaft and having at least one holding element, - wherein the holding device is configured such that the at least one holding element is, depending on an axial relative movement between the shaft and the holding device, radially movable relative to the driving section between a holding position, in which the screw head is axially held between the driving section and the holding element, and an opening position, in which the holding element axially releases the screw head, - wherein at least one locking element is provided which is, depending on an axial relative movement between the holding device and the shaft, movable into a first locking position locked on the shaft, in which position the holding device is connected to the shaft in detachable and axially fixed manner by means of the locking element and thus assumes an axially secure working position, - wherein in the working position the at least one holding element assumes the holding position, - and wherein the holding device has an inner sleeve mounted on the shaft and an outer sleeve mounted on the inner sleeve, wherein the at least one locking element is radially arranged between the inner sleeve and the outer sleeve and/or the shaft and the outer sleeve, - characterized in that in a release position the inner sleeve and the outer sleeve are connected to one another in detachable and axially fixed manner by means of the locking element, wherein the inner sleeve is axially released relative to the shaft.