The present invention provides a device for adjusting web-guiding roller (13) in one plane (12); the mechanism and the connection element of the device are antipollution. In the device, a roller (13) has a hollow axle (16) axially mounted in at least one frame wall (20, 31) and can be moved in the roll plane (12). At least one drive device (23, 24) is mounted in the hollow axle. The device makes at least one slide element (25, 26) move in an axial direction inside the axle. The axial movement (44, 49) of the slide element (25, 26) is converted into an adjusting movement (46, 51) of the hollow axle (16) in the roll plane (12) via a crank (27, 30) which has a fixed rotary point (29, 34) and is connected to the slide element (25, 26), by pivoting the crank (27, 30) about its rotary point (29, 30). |