Abstract: A testing device (1) for a thin-walled large bearing includes: a face board (2) allowing the bearing (60) as a test target to be installed thereon; a face board support mechanism (3) supporting the face board (2) such that the face board (2) can be tilted around a tilting central shaft (12); an angle change drive device (4) for changing a tilt angle of the face board (2); and a bearing rotation motor (52) for rotating an inner ring of the bearing (60). The face board support mechanism (3) and the angle change drive device (4) are capable of changing the orientation of the face board (2) in a range from a horizontal orientation through a vertical orientation to a tilted orientation. The face board (2) is provided with a bearing installation mechanism (6) for installing the bearing (60) such that an outer ring of the bearing (60) is fixed.