The invention relates to a method and machine for the dressing of a grinding tool (1), which has at least one tooth-shaped profile (2) with a first flank (3) and an opposing second flank (4). A disk-shaped dressing tool (5) used for dressing of the grinding tool (2) has a first abrasive area (6) and a second abrasive area (7). To allow a faster and thus more economical dressing of the grinding tool, the first abrasive area (6) contacts the first flank (3) and the second abrasive area (7) contacts the second flank (4) simultaneously, and the disc-shaped dressing tool (5) and/or the grinding tool (1) are pivoted relatively to another around an axis (A) being arranged perpendicular to the axis of rotation (C) of the grinding tool (1), so that both flanks (3, 4) are dressed simultaneously.