Objective: In clinical practice, a growing need exists for effective nonpharmacological treatments of adult ADHD. The authors present results from a cognitive-behaviorally oriented psychological group rehabilitation for adult ADHD. Method: A total of 29 adults with ADHD participated. Rehabilitation consisted of 10 or 11 weekly sessions. Participants were assessed with self-ratings (checklist for ADHD based on the "Diagnostic and Statistical Manual of Mental Disorders," Beck Depression Inventory II, Symptom Check List-90 [SCL-90], Brown ADD Scale for Adults [BADDS]), and the ratings of their significant others (BADDS) 3 months prior to treatment, at the beginning of treatment, and at the end of treatment. Also, the Wender Utah Rating Scale questionnaire was completed prior to rehabilitation. Results: Rehabilitation resulted in reduced self-reported symptoms in 16 ADHD-related items of SCL-90, BADDS total score, and BADDS subdomains of activation and affect. Conclusion: Results suggest that cognitive-behavioral group rehabilitation can be suitable in treating adult ADHD. (Contains 3 tables and 1 figure.)