Geriatric teams are more and more in front of patients presenting Parkinson syndromes. The frailty of the geriatric patient could be responsible of the non recognition of the diagnosis of the Parkinson and related diseases. A diagnostic approach is proposed in order to better define a care plan and to target the priorities. In collaboration with the general practitioner, the neurologist and the caregivers, an appropriate diagnosis allows to optimize and/or to adapt the treatment, to prevent the functional decline, to decrease the caregiver's burden, and eventually to improve the end of life.