Support device of metal for suspending a hanging scaffolding or other hanging construction, with a connecting body of metal for detachable fastening of a hanging scaffolding or other hanging construction to the support device and with a threaded rod of metal, which extends rectilinearly along the threaded rod longitudinal axis thereof and which has a first threaded rod end (30.1) which is upper in the mounted state of the support device, a second threaded rod end (30.2) which extends away therefrom in an opposite direction and which is lower in the mounted state of the support device, a threaded rod length corresponding with a spacing of the first threaded rod end (30.1) from the second threaded rod end (30.2) and an external thread extending substantially over the entire threaded rod length, wherein the first threaded rod end (30.1) is a free insertion and/or screw-in end for fastening the threaded rod to a wall element or support element, wherein the connecting body extends rectilinearly along the connecting body longitudinal axis thereof and has a first connecting body end, which faces towards the first threaded rod end (30.1) of the threaded rod and is upper in the mounted state of the support device and which has a first opening open towards the first threaded rod end (30.1) of the threaded rod and suitable for reception of the second threaded rod end (30.2) of the threaded rod, wherein the connecting body has a second connecting body end, which extends away from the first connecting body end in opposite direction and which is lower in the mounted state of the support device, wherein the connecting body has a connecting body length corresponding with a spacing of the first connecting body end from the second connecting body end, wherein the threaded rod is detachably fastened by way of its external thread to the connecting body by a screw connection, wherein the connecting body is a connecting tube, the connecting body longitudinal axis is a connecting tube longitudinal axis, the first connecting body end is a first connecting tube end (16.1), the second connecting body end is a second connecting tube end (16.2) and the connecting body length is a connecting tube length, wherein a connecting head of metal is fastened to the connecting tube in the region of the first connecting tube end (16.1) thereof and comprises a supporting and fastening body for suspended fastening of the connecting tube to the threaded rod, and wherein a height adjusting nut is detachably screwed by the internal thread thereof on the external thread of the threaded rod, characterised in that the supporting and fastening body as considered in the direction of the connecting tube longitudinal axis away from the second connecting tube end (16.2) is formed at a spacing from the first connecting tube end (16.1) to engage at least partly or completely over the first connecting tube end (16.1), that a connecting head use space is formed between the supporting and fastening body and the first connecting tube end (16.1), that the supporting and fastening body has at least one passage through which the threaded rod extends with play at least as far as into the connecting head use space so that a threaded rod part, which is provided with the external thread, of the threaded rod projects into the connecting head use space, that the height adjusting nut arranged in the connecting head use space is detachably screwed by the internal thread thereof onto the external thread of the threaded rod part, which projects into the connecting head use space, of the threaded rod, by means of which the connecting tube is detachably fastened to the threaded rod by way of the supporting and fastening body, and that the height adjusting nut is rotatable relative to the adjusting tube and relative to the threaded rod about the threaded rod longitudinal axis in a first rotational direction and in an opposite, second rotational direction and in the mounted state of the support device bears directly or indirectly against the supporting and fastening body to be rotatable relative thereto about the threaded rod longitudinal axis so that the connecting tube in the mounted state of the support device is adjustable in its height by rotation of the height adjusting nut either in the first rotational direction or in the second rotational direction about the threaded rod longitudinal axis.