Maria Holl (born 1953) is a qualified social worker and alternative practitioner for psychotherapy and has been working in her own practice as a psychotherapist, coach and meditation teacher in Aachen since 1981.

In 1995 she developed the Holl ^® Tinnitus Breathing Therapy (TAT), the effectiveness of which was confirmed by a scientific study at the University of Regensburg. She trains therapists in this method and has published several books and audio CDs on the treatment of psychosomatic complaints, including "Relieving Tinnitus", which has been translated into five languages.