Introduction Patients with Parkinson's disease have specific impairments in postural control, eye movements and attention. We tested whether these patients had impairments in the synergy between eye and body movements during standing visual tasks. Material and methods Nineteen patients (58.47±8.13 years old, Hoehn & Yahr stage II and III, on usual dopaminergic treatment) and twenty controls (62.15±6.92 years old) explored large images of house rooms (120° visual angle) by performing two visual tasks: precise (target localization) and non-precise (free viewing) with 6 trials of 45 sec per task. Eye (SMI) and body (Biometrics; Polhemus) movements as well as participants' attention to the performed task (oculometric data) were analyzed. Results Destabilizing relationships between eye and body movements were observed in patients with Parkinson's disease. This was a factor that increased their postural instability (p<0.001). These destabilizing relationships were exaggerated during the execution of the precise visual task (p=0.002) which required more attentional resources (p<0.001). Discussion - Conclusion Parkinson's disease seems to induce a rupture of the synergy between eye and body movements. Re-education exercises focused on visio-postural tasks would allow these patients to improve their stability and interaction with the environment.