RBD is one of the representative non-motor symptoms of PD and other synucleinopathies. Patients with RBD show dream-enacting behaviors such as punching, kicking, singing, screaming, or somnambulism. These can interfere in sleep quality and increase the risk of falling down from the bed and physical injuries of both the patient and sleep partner. Therefore, qualities of life of the patient and sleep partner are negatively influenced by presence of RBD.