Introduction: A relationship between vestibular disorders and thyroid autoimmunity independently from thyroid function has been postulated. Aim: To shed more light on the actual relationship between vestibular lesions and Hashimoto's thyroiditis (HT) regardless of thyroid function. Methods: Forty-seven patients with HT (89.4% F; aged 48.3 ± 12.7 years), 21 with multinodular goitre (MNG; 57.1% F; 54.1 ± 9. 8 years) and 30 healthy volunteers (56.7% F; 50.7 ± 13.9 years) were enrolled. Inclusion criteria were the presence of normal thyroid function tests and no clinical history of vestibular dysfunction. Each subject was submitted to complete vestibular evaluation [Caloric Test, Vestibular evoked myogenic potentials (VEMPs), Head Shaking Test (HST)]. Results: 52.2% of HT patients showed an alteration of VEMPs and 44.7% of caloric test (P