Dialectical behavior therapy (DBT) was originally developed by Linehan (1993a, b) and modified by Miller et al. (1997) for suicidal adolescents with borderline personality features. Meanwhile, this therapy has also successfully applied in other adult clinical groups. The prior aim of the study is to evaluate the effectiveness of DBT for inpatient adolescents with anorexia and bulimia nervosa. In this pilot study (n=31) the efficacy of this treatment will be evaluated in a pre-post comparison. Different instruments will be used (SIAB, EDI-2, SCL-90-R, FBB). The first results are promising and we must hope that this new approach will improve the future treatment.