Adopting the role of witness can help supervisors to cope with emotional flooding and fluctuations in the supervisees' self-experience. Assuming the role of witness aids modification of the supervisors' tendency to hold the supervisees' in mind and to respond to their selfobject needs and provides the supervisees with a participatory yet external presence, which enhances the supervisees' creativity. The meaning and the uses of the role of witness in the supervisory context are explained and illustrated in the present article.