Holding device for releasable fastening onto a building roof, in particular in a region of a verge of the building roof, which comprises the following: - at least one tensioning element, which is of elongated shape and comprises a first longitudinal extension direction; - a first tensioning arm comprising a tensioning element support, wherein the tensioning element support supports the tensioning element; - a second tensioning arm; and - a connecting device having a second longitudinal extension direction connecting the first tensioning arm to the second tensioning arm, wherein at least one of the first tensioning arm and the second tensioning arm is a movable tensioning arm (110, 120) which is movable relatively to the connecting device in such a way that a distance between the first tensioning arm and the second tensioning arm, into which a part of the building roof is clampable, is variable, wherein, when the holding device is mounted onto the building roof, the first longitudinal extension direction of the at least one tensioning element is aligned at least substantially orthogonally to the second longitudinal extension direction of the connecting device; and wherein a tensioning arm holder of the at least one movable tensioning arm (110, 120) is connected to a threaded element, which is constructed in several parts, and wherein the connecting device comprises a connecting strut which is hollow at least in some areas and in which a threaded spindle is arranged at least in some areas characterized in that the threaded element comprises an elongated guide part and a nut which is removably inserted into the elongated guide part and is engaged with the threaded spindle in such a way that the at least one movable tensioning arm (110, 120) moves in translation relatively to the connecting device when the threaded spindle is rotated. - at least one tensioning element, which is of elongated shape and comprises a first longitudinal extension direction; - a first tensioning arm comprising a tensioning element support, wherein the tensioning element support supports the tensioning element; - a second tensioning arm; and - a connecting device having a second longitudinal extension direction connecting the first tensioning arm to the second tensioning arm, wherein at least one of the first tensioning arm and the second tensioning arm is a movable tensioning arm (110, 120) which is movable relatively to the connecting device in such a way that a distance between the first tensioning arm and the second tensioning arm, into which a part of the building roof is clampable, is variable, wherein, when the holding device is mounted onto the building roof, the first longitudinal extension direction of the at least one tensioning element is aligned at least substantially orthogonally to the second longitudinal extension direction of the connecting device; and wherein a tensioning arm holder of the at least one movable tensioning arm (110, 120) is connected to a threaded element, which is constructed in several parts, and wherein the connecting device comprises a connecting strut which is hollow at least in some areas and in which a threaded spindle is arranged at least in some areas characterized in that the threaded element comprises an elongated guide part and a nut which is removably inserted into the elongated guide part and is engaged with the threaded spindle in such a way that the at least one movable tensioning arm (110, 120) moves in translation relatively to the connecting device when the threaded spindle is rotated.