Eating Disorders (ED) are often severe illnesses entailing a heavy burden for families. Family therapy is recommended for young patients, but only a few studies have investigated therapeutic interventions with families tailored also to adult and longstanding patients. We recruited 87 families with daughters affected by an ED, aiming to assess the effectiveness of eight sessions of parent counselling. The primary outcome was the improvement of parents' coping abilities to achieve more effective support skills. Before treatment, 54% of parents showed poor coping resources whereas 43.7% of the sample improved after parent counselling. Parents with good coping resources responded significantly better to this treatment. Although future research is warranted, these preliminary findings support the effectiveness of parent counselling in ED.