Sheet metal processing machine for processing sheet metal along a processing line, wherein the sheet metal processing machine has a stop system with at least one stop element (A 1, A 2, A 3, A 4, A 5) for an edge of the sheet metal element to be processed and an adjusting mechanism for adjusting the position of the at least one stop element, wherein the adjustment mechanism comprises two support rails (7, 8) arranged parallel to one another and a plurality of finger bars (F 1, F 2, F 3, F 4, F 5) characterised in that, each finger bar (F 1, F 2, F 3, F 4, F 5) is hinged to both support rails (7, 8) and determines with its front end the position of the at least one stop element (A 1, A 2, A 3, A 4, A 5) or forms with its front end the at least one stop element (A 1, A 2, A 3, A 4, A 5), wherein each support rail (7, 8) is attached via compensating levers (L 1, L 2, R 1, R 2) at two carriages (9, 10) of the adjusting mechanism, wherein the two carriages (9, 10) are arranged to the left and right of the centre of the support rails and can be moved along a guide (11, 12) provided for this purpose perpendicular to the processing line, wherein the support rails (7, 8) in a basic position of the adjusting mechanism are aligned in parallel to the processing line and wherein the support rails (7, 8) in an inclined position of the adjusting mechanism are aligned at an inclined angle to the processing line, while the finger bars (F 1, F 2, F 3, F 4, F 5) are aligned perpendicular to the processing line both in the basic position and in the inclined position, and wherein the adjusting mechanism has a centring mechanism which acts on at least one support rail (7, 8) and by means of which the pivot point (P 1, P 2) of both support rails (7, 8) is held in a central region of the respective support rail (7, 8) during the transition from the basic position to the inclined position. wherein the sheet metal processing machine has a stop system with at least one stop element (A 1, A 2, A 3, A 4, A 5) for an edge of the sheet metal element to be processed and an adjusting mechanism for adjusting the position of the at least one stop element, wherein the adjustment mechanism comprises two support rails (7, 8) arranged parallel to one another and a plurality of finger bars (F 1, F 2, F 3, F 4, F 5) characterised in that, each finger bar (F 1, F 2, F 3, F 4, F 5) is hinged to both support rails (7, 8) and determines with its front end the position of the at least one stop element (A 1, A 2, A 3, A 4, A 5) or forms with its front end the at least one stop element (A 1, A 2, A 3, A 4, A 5), wherein each support rail (7, 8) is attached via compensating levers (L 1, L 2, R 1, R 2) at two carriages (9, 10) of the adjusting mechanism, wherein the two carriages (9, 10) are arranged to the left and right of the centre of the support rails and can be moved along a guide (11, 12) provided for this purpose perpendicular to the processing line, wherein the support rails (7, 8) in a basic position of the adjusting mechanism are aligned in parallel to the processing line and wherein the support rails (7, 8) in an inclined position of the adjusting mechanism are aligned at an inclined angle to the processing line, while the finger bars (F 1, F 2, F 3, F 4, F 5) are aligned perpendicular to the processing line both in the basic position and in the inclined position, and wherein the adjusting mechanism has a centring mechanism which acts on at least one support rail (7, 8) and by means of which the pivot point (P 1, P 2) of both support rails (7, 8) is held in a central region of the respective support rail (7, 8) during the transition from the basic position to the inclined position.