A method and an arrangement for the measurement of angles at a workpiece (2) during the bending of the workpiece (2) to a predetermined angle in a press brake (1), where the bending operation takes place between a moveable die (4) and a pressure table (5), comprising a measurement arrangement (15) that can be displaced parallel to the workpiece (2) with a measurement head (18) intended for the measurement of the angle at the workpiece (2) after the bending operation, and adjustment means (10) for adjusting the curvature of the pressure table (5). The arrangement comprises a guide (14) for the control of the measurement arrangement (15), which guide is arranged parallel to the moveable die (4) and along which the measurement arrangement (15) runs.