The dialectical-behavioral therapy (DBT) by Marsha Linehan is an evidence-based therapy program for treating patients with borderline personality disorder (BPD). A key treatment goal of DBT is to develop or improve functional strategies for emotion regulation. This therapy manual provides a detailed description of the specific therapeutic approach within outpatient DBT for the first time. The book initially describes the disorder, informs about diagnostic procedures, and explains the development of the disorder. Subsequently, the therapeutic approach in individual sessions is detailed through numerous example dialogues. The DBT strategies used are clearly marked, which significantly facilitates the implementation of the approach in therapeutic practice.