Impulse control disorders including hypersexuality occur occasionally in Parkinson's disease, especially when treated with dopamine agonist. A 62-year-old male with Parkinson's disease was initially treated with rasagiline monotherapy and presented hypersexuality. After 8 weeks of discontinuation of the drug, his hypersexual behavior was significantly improved. To our knowledge, this is the first reported Asian case of a hypersexuality caused by rasagiline. Our observation emphasizes that patients and caregivers need to be educated on the possibility of hypersexuality resulting from rasagiline.