Because there is limited literature on sexual function in Parkinson disease, in this study, we examined sexual functioning in a large groups of patients with idiopathic Parkinson Disease compared with healthy subjects in the Italian community. To assess sexual function in PD we used the Brief Index of Sexual Functioning [(BISF-M for man; BISF-W for woman), the International Index of Erectile Function (IIEF) and the Female Sexual Function Index (FSFI). Participants were also assessed by the Beck Depression Inventory (BDI).