The invention relates to a glass-bending device, comprising a bending chamber (8), a tool (1) for holding at least one glass pane (I, II) by means of a suction effect, comprising a frame-like, convex contact surface (2) directed downward and a cover (3) having a peripheral air-guiding plate (4) surrounding the contact surface (2) at least in some regions, wherein the tool (1) is suitable for sweeping the edge of the glass pane (I, II) with an air flow at least in some segments and thereby pressing the glass pane (I, II) onto the contact surface (2), and a fan (5), which is connected to the bending chamber (8) by means of a feed line (6) and a return line (7) and is suitable for extracting air from the bending chamber (8) by means of the tool (1) and the feed line (6) in order to produce the air flow (L) and for returning air to the bending chamber (8) by means of the return line (7), wherein the return line (7) is connected to the bending chamber (8) above the tool (1).