Aligning device and method for aligning a guide rail of an elevator system

An aligning device for aligning a guide rail of an elevator system, the aligning device comprising:

• two rail bracket parts being a lower rail bracket part and an upper rail bracket part, wherein the lower rail bracket part is adapted to be fixed to a shaft wall of an elevator shaft of the elevator system and wherein the upper rail bracket part is adapted to hold the guide rail of the elevator system fixed to the upper rail bracket part;
• at least two movement elements;
• wherein the lower rail bracket part and the upper rail bracket part each have a connecting region for fixing the two rail bracket parts to one another;
• and
• wherein the movement elements each interact with the connecting parts to move the lower rail bracket part relative to the upper rail bracket part, each of the movement elements being rotatable about an axis of rotation thereof and interacting eccentrically with respect to the axis of rotation with at least one of the rail bracket parts so as to abut laterally opposite contact surfaces in the connecting region of the at least one rail bracket part.