Thoracic orthosis (10) for the on-demand relief of the spine of a human user, comprising - a back splint (12) made of a leaf-like material which is compression-resistant in its longitudinal direction and, when in use, rests with a ventral flat side against the back extensor muscles adjacent to the user's spine on both sides in the area of the thoracic and at least the upper
lumbar vertebrae, as well as - a
shoulder support system connected to the back rail (12) with two support elements (14) which, in use, encompass the user's shoulders like a backpack, characterized in that - the back rail (12) is constructed in one piece from said sheet-like material, which is a sagittal flexible carbon material and - each support element (14) of the
shoulder support system is made of a sheet-like carbon material and, in use, forms a ring encompassing the user's associated shoulder, which, starting from the cranial end of the
back brace (12), lies flat against the user's shoulder,
clavicle and
pectoral muscle, parallel to the user's rib arches, and is guided back to the
back brace (12) and is connected to it in the lower area of its
upper third and / or the upper area of its middle third.