A seat extension apparatus for a cabin dividing element, in particular of an aircraft cabin, the seat extension apparatus comprising at least: - an extension device having a mounting side (3.1) and a bed surface side (3.2), wherein the extension device is movable between a vertical stowed position and a horizontal use position, and - a support structure coupled to the extension device to pivotably support the extension device, wherein the support structure comprises at least one pivotable strut element having at least one end (5.1) pivotably coupled to the mounting side (3.1) of the extension device and at least one free end (5.2), wherein: - in the vertical stowed position of the extension device the strut element is arranged substantially parallel to a longitudinal axis (a) of the extension device, and - in the horizontal use position of the extension device the strut element is arranged substantially perpendicular or angled to the longitudinal axis (a) of the extension device, further wherein the support structure comprises at least one support linkage which pivotably couples the extension device to the support structure, wherein the support linkage is coupled to each one of the extension device and the support structure via a pivot point (PP1, PP2), the pivot point coupling the support linkage to the support structure being arranged in a bracket, the bracket configured to be fixedly connected to a bottom side of a wall surface (2.1) of the cabin dividing element or to a cabin floor, wherein a pivot point of the strut element and the pivot point of the support linkage are substantially arranged on the same pivot axis, and wherein a rear side (3.5) of the extension device comprises at least one latch mechanism to latch the extension device in the horizontal use position. - an extension device having a mounting side (3.1) and a bed surface side (3.2), wherein the extension device is movable between a vertical stowed position and a horizontal use position, and - a support structure coupled to the extension device to pivotably support the extension device, wherein the support structure comprises at least one pivotable strut element having at least one end (5.1) pivotably coupled to the mounting side (3.1) of the extension device and at least one free end (5.2), wherein: - in the vertical stowed position of the extension device the strut element is arranged substantially parallel to a longitudinal axis (a) of the extension device, and - in the horizontal use position of the extension device the strut element is arranged substantially perpendicular or angled to the longitudinal axis (a) of the extension device, further wherein the support structure comprises at least one support linkage which pivotably couples the extension device to the support structure, wherein the support linkage is coupled to each one of the extension device and the support structure via a pivot point (PP1, PP2), the pivot point coupling the support linkage to the support structure being arranged in a bracket, the bracket configured to be fixedly connected to a bottom side of a wall surface (2.1) of the cabin dividing element or to a cabin floor, wherein a pivot point of the strut element and the pivot point of the support linkage are substantially arranged on the same pivot axis, and wherein a rear side (3.5) of the extension device comprises at least one latch mechanism to latch the extension device in the horizontal use position. wherein the support linkage is coupled to each one of the extension device and the support structure via a pivot point (PP1, PP2), the pivot point coupling the support linkage to the support structure being arranged in a bracket, the bracket configured to be fixedly connected to a bottom side of a wall surface (2.1) of the cabin dividing element or to a cabin floor, wherein a pivot point of the strut element and the pivot point of the support linkage are substantially arranged on the same pivot axis, and wherein a rear side (3.5) of the extension device comprises at least one latch mechanism to latch the extension device in the horizontal use position.