The reliability and validity of a German version (MPI-D) of the West Haven-Yale Multidimensional Pain Inventory (WHYMPI) was assessed in a sample of 185 chronic pain patients. MPI-D shows high internal consistency, valid subscales, and a factor structure that is comparable to the American version. The Interference scale of part 1 includes an additional item and one other item was excluded; the Life Control scale had one item added. In section 2, one item was dropped, and in section 3 only 3 instead of 4 activity scales were found. The questionnaire is sensitive to therapeutic change. The German scale means are lower for the scales indicating more disturbance or severity and higher for the scales indicating less disturbance. It is not clear whether this reduced pain impact is characteristic of German pain patients in general, or whether it is due to the less severely affected sample tested in this study.