A mounting device for a stand device for arrangement in the operating room and to position or displace a medical apparatus in the operating room, in particular by means of a rotational movement, incorporates a mounting apparatus, which extends along an axis of rotation in a longitudinal direction and has a cavity, which in particular is cylindrical and which is oriented in the longitudinal direction, for accommodating a rotatably supportable connection component of the stand device, in particular a spindle； and an adjustment apparatus for arranging the connection component in a position, which can be predefined, in relation to the mounting apparatus； wherein the mounting device forms a rotational coupling for supporting the connection component on the mounting apparatus, which rotational coupling can be adjusted about the axis of rotation. The invention further relates to a mounting system including such a mounting device.
