The disclosure relates to a robot, for example for patient positioning, comprising a robot arm with a plurality of robot elements, which are connected to one another by means of shaft units. The shaft units define a respective at least one movement axis of the robot arm. The robot arm comprises a first end region, which permits an arrangement in a surrounding area of the robot, and a second end region, on which an end effector can be arranged. A first shaft unit arranged after the first end region defines a first rotational axis of the robot arm. The robot arm can be arranged in the surrounding area by means of the first end region in such a way that the first rotational axis runs at an angle transverse to the surrounding area.