Turning device (24) for turning the drive train (1) of a wind energy system or at least of partial sections of same, whereby the drive train (1) is mounted to rotate in a machine frame (2), whereby the drive train (1) comprises a flange (16), and the turning device (24) comprises a console (29a) that can be fixed in place on the machine frame (2). The task of the present invention is to indicate a turning device that can turn the drive train (1) at any desired point, without using the gear mechanism (4). This task is accomplished by means of an adapter disk (17) that can be affixed to the flange (16), which has a plurality of force application points (19) that are disposed along a circle (20), and having at least one linear setting element (28a), which is mounted in the console (29a), on the one side, so as to move in terms of angle, and which can be coupled with the adaptor disk (17), on the other side, by way of its force application points (19), so as to move in terms of angle.